JEE MATHS UNIT 13
QUIZ NO 2
TOTAL QUESTIONS = 20
1. The probability of getting a sum of 8 when two dice are rolled is
A. 5/36
B. 1/6
C. 7/36
D. 1/12
2. If the mean of 5 numbers is 18 and the sum of four numbers is 70, the fifth number is
A. 20
B. 18
C. 25
D. 22
3. The variance of the data 4, 8, 6, 10 is
A. 5
B. 6
C. 4
D. 3
4. If P(A) = 0.4, P(B) = 0.5, and P(A ∩ B) = 0.2, then P(A | B) is
A. 0.4
B. 0.2
C. 0.5
D. 0.6
5. The standard deviation of the data 1, 2, 3, 4, 5 is
A. sqrt(2)
B. sqrt(3)
C. 2
D. 1
6. The number of ways to arrange the letters in the word "PROBABILITY" is
A. 113400
B. 45360
C. 30240
D. 151200
7. The probability of getting a head and a tail in two coin tosses is
A. 1/2
B. 1/4
C. 3/4
D. 1/3
8. If the median of the data 2, 4, 6, x, 10 is 6, the value of x is
A. 8
B. 6
C. 5
D. 7
9. The mean of the first 20 natural numbers is
A. 10
B. 10.5
C. 11
D. 12
10. If two events A and B are mutually exclusive, then P(A ∪ B) is equal to
A. P(A) + P(B)
B. P(A) * P(B)
C. P(A) - P(B)
D. P(A) / P(B)
11. The range of the data 1, 3, 5, 7, 9 is
A. 8
B. 7
C. 6
D. 5
12. The probability of drawing a red king from a standard deck of 52 cards is
A. 1/26
B. 1/13
C. 1/52
D. 1/12
13. The mode of the dataset 5, 6, 8, 5, 7, 6, 6, 8 is
A. 5
B. 6
C. 7
D. 8
14. The mean of the data 10, 20, 30, 40, 50 is
A. 30
B. 25
C. 35
D. 40
15. The probability of selecting a card that is either a king or a queen is
A. 2/13
B. 1/26
C. 1/13
D. 3/13
16. The number of ways to select 3 cards from a deck of 52 cards is
A. 22100
B. 2600
C. 13500
D. 5525
17. The variance of the data 2, 4, 6, 8 is
A. 5
B. 4
C. 6
D. 7
18. If the mean and variance of a data set are 10 and 4, then the standard deviation is
A. 2
B. 4
C. 6
D. 8
19. The probability of selecting a vowel from the English alphabet is
A. 5/26
B. 4/26
C. 6/26
D. 7/26
20. The median of the dataset 1, 3, 3, 6, 7, 8, 9 is
A. 6
B. 5
C. 7
D. 4
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