Quiz
STATISTICS & PROBABILITY SUNDAY 07/02/2021
Perguntas do quiz (40)
1The 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- A40
- B48
- C52
- D50
2In the given data if n = 44, l = 400, cf = 8, h = 100, f = 20, then its median is
- A470
- B460
- C480
- D400
3The 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
- A2.5
- B3
- C2
- D1
4For 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- A110
- B80
- C90
- D100
5Consider 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- A20
- B18
- C0
- D17
6If ∑fi = 15, ∑fixi = 3p + 36 and the mean of the distribution is 3, then the value of p is
- A4
- B2
- C5
- D3
7If ∑fixi = 1860 and ∑fi = 30, then the value of x¯¯¯ is
- A62
- B64
- C63
- D26
8In the formula x¯¯¯=a+∑fidi / ∑fi, di represents
- Aa - xi
- B2a+xi
- Cxi+a
- Ddi=xi-a
9The mean of the data when ∑fidi = -500, ∑fi = 100 and a = 125 is
- A-500
- B120
- C125
- D100
10The mean of the first 10 prime numbers is
- A129
- B12.9
- C1.29
- D11.9
11The mean of the data when ∑fidi = 435, ∑fi = 30 and a = 47.5 is
- A47.5
- B63
- C30
- D62
12The mean of all the factors of 24 is
- A6.5
- B24
- C7.5
- D7
13The 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:
- A50
- B65
- C70
- D60
14The 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
- A32
- B36
- C23
- D13
15The arithmetic mean of 1, 2, 3, 4, ……………….., n is
- An(n+1)/2
- Bn+1/2
- Cn/2
- Dn-1/2
16The 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- A17
- B27
- C20
- D28
17Upper class limit + Lower class limit / 2
- ANone of these
- BClass mark
- Cfrequency
- Dclass size
18In a data, if l = 40, h = 15, f1 = 7, f0 = 3, f2 = 6, then the mode is
- A52
- B72
- C82
- D62
19For the following distribution
Below 10 20 30 40 50 60
Frequency 3 12 27 57 75 80
the modal class is- A20-30
- B40-50
- C30-40
- D50-60
20The 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- A27
- B20
- C18
- D17
21A 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
- A11/13
- B11/26
- C1/26
- D4/13
22An unbiased die is thrown once. The probability of getting a prime number is
- A1/3
- B1/5
- C1/2
- D1/4
23A die is thrown once. The probability of getting an even number and a multiple of 3 is
- A1/2
- B1/3
- C1/6
- D1/5
24A 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:
- A7/10
- B3/10
- C1/10
- D5/10
25There 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
- A2/3
- B1/2
- C1
- D1/3
26If p is the probability of an event, then p satisfies
- A0 ≤ p ≤ 1
- B0 < p < 1
- C0 ≤ p < 1
- D0 < p ≤ 1
27Two dice are thrown simultaneously. The probability of getting a doublet is
- A1/6
- B1/4
- C2/3
- D1/3
28An unbiased die is thrown once. The probability of getting a prime or composite number is
- A5/6
- B1/6
- C1
- D1/2
29The probability of getting 3 head or 3 tails in tossing a coin 3 times is
- A1/2
- B3/8
- C1/4
- D1/8
30Two dice are rolled simultaneously. The probability that the sum of the numbers on the faces is 9 is
- A4/9
- B5/9
- C2/9
- D1/9
31A 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
- A1/10
- B4/10
- C3/10
- D1/5
32A number is selected at random from 1 to 75. The probability that it is a perfect square is
- A4/75
- B8/75
- C6/75
- D10/75
33The probability that it will rain on a particular day is 0.76. The probability that it will not rain on that day is
- A0
- B1
- C0.76
- D0.24
34From a well shuffled pack of 52 cards, one card is drawn at random. The probability of getting a red queen is
- A1/26
- B3/26
- C1/13
- D1/2
35Ram and Shyam are friends. The probability that both will have the birthday on the same day is
- A1/365
- B2/365
- C364/365
- D4/365
36A letter of English alphabets is chosen at random. The probability that the letter chosen is a consonant is
- A2/26
- B21/26
- C1/26
- D5/26
37The 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
- A4/49
- B3/52
- C3/49
- D4/52
38Which of the following cannot be the probability of an event:
- A2/3
- B-1.5
- C15%
- D0.7
39Cards 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?
- A0
- B1
- C2
- D3
40What is the probability of getting a number less than 7 in a single throw of a die?
- A0
- B1/2
- C1
- DNone of these
Informações
- Descrição
- 10th grade Mathematics Quiz sobre STATISTICS & PROBABILITY SUNDAY 07/02/2021, criado por Satish Thakur em 06-02-2021.
- Autor
- Satish Thakur
- Idioma
- English
- Visualizações
- 468
- Etiquetas
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