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
40
48
52
50
In the given data if n = 44, l = 400, cf = 8, h = 100, f = 20, then its median is
470
460
480
400
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
2.5
3
2
1
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
110
80
90
100
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
20
18
0
17
If ∑fi = 15, ∑fixi = 3p + 36 and the mean of the distribution is 3, then the value of p is
4
5
If ∑fixi = 1860 and ∑fi = 30, then the value of x¯¯¯ is
62
64
63
26
In the formula x¯¯¯=a+∑fidi / ∑fi, di represents
a - xi
2a+xi
xi+a
di=xi-a
The mean of the data when ∑fidi = -500, ∑fi = 100 and a = 125 is
-500
120
125
The mean of the first 10 prime numbers is
129
12.9
1.29
11.9
The mean of the data when ∑fidi = 435, ∑fi = 30 and a = 47.5 is
47.5
30
The mean of all the factors of 24 is
6.5
24
7.5
7
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:
65
70
60
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
32
36
23
13
The arithmetic mean of 1, 2, 3, 4, ……………….., n is
n(n+1)/2
n+1/2
n/2
n-1/2
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
27
28
Upper class limit + Lower class limit / 2
None of these
Class mark
frequency
class size
In a data, if l = 40, h = 15, f1 = 7, f0 = 3, f2 = 6, then the mode is
72
82
Below 10 20 30 40 50 60 Frequency 3 12 27 57 75 80 the modal class is
20-30
40-50
30-40
50-60
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
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
11/13
11/26
1/26
4/13
An unbiased die is thrown once. The probability of getting a prime number is
1/3
1/5
1/2
1/4
A die is thrown once. The probability of getting an even number and a multiple of 3 is
1/6
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:
7/10
3/10
1/10
5/10
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
2/3
If p is the probability of an event, then p satisfies
0 ≤ p ≤ 1
0 < p < 1
0 ≤ p < 1
0 < p ≤ 1
Two dice are thrown simultaneously. The probability of getting a doublet is
An unbiased die is thrown once. The probability of getting a prime or composite number is
5/6
The probability of getting 3 head or 3 tails in tossing a coin 3 times is
3/8
1/8
Two dice are rolled simultaneously. The probability that the sum of the numbers on the faces is 9 is
4/9
5/9
2/9
1/9
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
4/10
A number is selected at random from 1 to 75. The probability that it is a perfect square is
4/75
8/75
6/75
10/75
The probability that it will rain on a particular day is 0.76. The probability that it will not rain on that day is
0.76
0.24
From a well shuffled pack of 52 cards, one card is drawn at random. The probability of getting a red queen is
3/26
1/13
Ram and Shyam are friends. The probability that both will have the birthday on the same day is
1/365
2/365
364/365
4/365
A letter of English alphabets is chosen at random. The probability that the letter chosen is a consonant is
2/26
21/26
5/26
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
4/49
3/52
3/49
4/52
Which of the following cannot be the probability of an event:
-1.5
15%
0.7
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?
What is the probability of getting a number less than 7 in a single throw of a die?
