28578941
Descripción
Test por Satish Thakur, actualizado hace más de 1 año
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Creado por Satish Thakur
hace alrededor de 3 años
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Pregunta 1
Pregunta
The percentage of marks obtained by 100 students in an examination are as follows:
Marks 130-135 135-140 140-145 145-150 150-155 155-160 160-165
Frequency 14 16 18 23 18 8 3
The cumulative frequency of the class interval 140 - 145 is
Respuesta
-
40
-
48
-
52
-
50
Pregunta 2
Pregunta
In the given data if n = 44, l = 400, cf = 8, h = 100, f = 20, then its median is
Respuesta
-
470
-
460
-
480
-
400
Pregunta 3
Pregunta
The wickets taken by a bowler in 10 cricket matches are 2, 6, 4, 5, 0, 3, 1, 3, 2, 3. The median of the data is
Respuesta
-
2.5
-
3
-
2
-
1
Pregunta 4
Pregunta
For the following distribution
Class 60-70 70-80 80-90 90-100 100-110
Frequency 13 10 15 8 11
the upper limit of the median class is
Respuesta
-
110
-
80
-
90
-
100
Pregunta 5
Pregunta
Consider the data
Class 65-85 85-105 105-125 125-145 145-165 165-185 185-205
Frequency 4 5 18 20 17 7 4
The difference of the upper limit of the median class and the lower limit of the modal class is
Respuesta
-
20
-
18
-
0
-
17
Pregunta 6
Pregunta
If ∑fi = 15, ∑fixi = 3p + 36 and the mean of the distribution is 3, then the value of p is
Respuesta
-
4
-
2
-
5
-
3
Pregunta 7
Pregunta
If ∑fixi = 1860 and ∑fi = 30, then the value of x¯¯¯ is
Respuesta
-
62
-
64
-
63
-
26
Pregunta 8
Pregunta
In the formula x¯¯¯=a+∑fidi / ∑fi, di represents
Respuesta
-
a - xi
-
2a+xi
-
xi+a
-
di=xi-a
Pregunta 9
Pregunta
The mean of the data when ∑fidi = -500, ∑fi = 100 and a = 125 is
Respuesta
-
-500
-
120
-
125
-
100
Pregunta 10
Pregunta
The mean of the first 10 prime numbers is
Respuesta
-
129
-
12.9
-
1.29
-
11.9
Pregunta 11
Pregunta
The mean of the data when ∑fidi = 435, ∑fi = 30 and a = 47.5 is
Respuesta
-
47.5
-
63
-
30
-
62
Pregunta 12
Pregunta
The mean of all the factors of 24 is
Respuesta
-
6.5
-
24
-
7.5
-
7
Pregunta 13
Pregunta
The arithmetic mean of a set of 40 values is 65. If each of the 40 values is increased by 5, what will be the mean of the set of new values:
Respuesta
-
50
-
65
-
70
-
60
Pregunta 14
Pregunta
The mean of 25 observations is 36. If the mean of the first 13 observations is 32 and that of the last 13 observations is 39, then the 13th observation is
Respuesta
-
32
-
36
-
23
-
13
Pregunta 15
Pregunta
The arithmetic mean of 1, 2, 3, 4, ……………….., n is
Respuesta
-
n(n+1)/2
-
n+1/2
-
n/2
-
n-1/2
Pregunta 16
Pregunta
The arithmetic mean of the following data is 53.
Class 0-20 20-40 40-60 60-80 80-100
Frequency 12 15 32 p 13
The value of p is
Respuesta
-
17
-
27
-
20
-
28
Pregunta 17
Pregunta
Upper class limit + Lower class limit / 2
Respuesta
-
None of these
-
Class mark
-
frequency
-
class size
Pregunta 18
Pregunta
In a data, if l = 40, h = 15, f1 = 7, f0 = 3, f2 = 6, then the mode is
Respuesta
-
52
-
72
-
82
-
62
Pregunta 19
Pregunta
For the following distribution
Below 10 20 30 40 50 60
Frequency 3 12 27 57 75 80
the modal class is
Respuesta
-
20-30
-
40-50
-
30-40
-
50-60
Pregunta 20
Pregunta
The time in seconds, taken by 75 athletes to run a 500m race are tabulated as below:
Class 65-85 85-105 105-125 125-145 145-165 165-185 185-205
Frequency 4 5 18 20 17 7 4
The number of athletes who completed the race in less than 125 seconds is
Respuesta
-
27
-
20
-
18
-
17
Pregunta 21
Pregunta
A card is drawn at random from a pack of 52 cards. The probability that the card is drawn is neither an ace nor a king is
Respuesta
-
11/13
-
11/26
-
1/26
-
4/13
Pregunta 22
Pregunta
An unbiased die is thrown once. The probability of getting a prime number is
Respuesta
-
1/3
-
1/5
-
1/2
-
1/4
Pregunta 23
Pregunta
A die is thrown once. The probability of getting an even number and a multiple of 3 is
Respuesta
-
1/2
-
1/3
-
1/6
-
1/5
Pregunta 24
Pregunta
A number is selected at random from the numbers 7, 3, 9, 7, 9, 5, 7, 9, 9, 5. The probability that the selected number is their average is:
Respuesta
-
7/10
-
3/10
-
1/10
-
5/10
Pregunta 25
Pregunta
There are 8 defective items in a sample of 24 items. One item is drawn at random. The probability that it is a non-defective item is
Respuesta
-
2/3
-
1/2
-
1
-
1/3
Pregunta 26
Pregunta
If p is the probability of an event, then p satisfies
Respuesta
-
0 ≤ p ≤ 1
-
0 < p < 1
-
0 ≤ p < 1
-
0 < p ≤ 1
Pregunta 27
Pregunta
Two dice are thrown simultaneously. The probability of getting a doublet is
Respuesta
-
1/6
-
1/4
-
2/3
-
1/3
Pregunta 28
Pregunta
An unbiased die is thrown once. The probability of getting a prime or composite number is
Respuesta
-
5/6
-
1/6
-
1
-
1/2
Pregunta 29
Pregunta
The probability of getting 3 head or 3 tails in tossing a coin 3 times is
Respuesta
-
1/2
-
3/8
-
1/4
-
1/8
Pregunta 30
Pregunta
Two dice are rolled simultaneously. The probability that the sum of the numbers on the faces is 9 is
Respuesta
-
4/9
-
5/9
-
2/9
-
1/9
Pregunta 31
Pregunta
A ticket is drawn from a bag containing 100 tickets numbered from 1 to 100. The probability of getting a ticket with a number divisible by 10 is
Respuesta
-
1/10
-
4/10
-
3/10
-
1/5
Pregunta 32
Pregunta
A number is selected at random from 1 to 75. The probability that it is a perfect square is
Respuesta
-
4/75
-
8/75
-
6/75
-
10/75
Pregunta 33
Pregunta
The probability that it will rain on a particular day is 0.76. The probability that it will not rain on that day is
Respuesta
-
0
-
1
-
0.76
-
0.24
Pregunta 34
Pregunta
From a well shuffled pack of 52 cards, one card is drawn at random. The probability of getting a red queen is
Respuesta
-
1/26
-
3/26
-
1/13
-
1/2
Pregunta 35
Pregunta
Ram and Shyam are friends. The probability that both will have the birthday on the same day is
Respuesta
-
1/365
-
2/365
-
364/365
-
4/365
Pregunta 36
Pregunta
A letter of English alphabets is chosen at random. The probability that the letter chosen is a consonant is
Respuesta
-
2/26
-
21/26
-
1/26
-
5/26
Pregunta 37
Pregunta
The king, queen and jack of clubs are removed from a deck of 52 cards and the remaining cards are shuffled. A card is drawn from the remaining cards. The probability of getting a king is
Respuesta
-
4/49
-
3/52
-
3/49
-
4/52
Pregunta 38
Pregunta
Which of the following cannot be the probability of an event:
Respuesta
-
2/3
-
-1.5
-
15%
-
0.7
Pregunta 39
Pregunta
Cards each marked with one of the numbers 4,5,6,…20 are placed in a box and mixed thoroughly. One card is drawn at random from the box, what is the probability of getting an even prime number?
Respuesta
-
0
-
1
-
2
-
3
Pregunta 40
Pregunta
What is the probability of getting a number less than 7 in a single throw of a die?
Respuesta
-
0
-
1/2
-
1
-
None of these
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