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# 9th Class - Math | Chapter: Probability MCQs

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## Q1) The probability of each event, when a coin is tossed for 1000 times with frequencies: Head:455 & Tail: 545 is

(A) 0.455 & 0.545
(B) 0.5 & 0.5
(C) 0.45 & 0.55
(D) 455 & 545

(A) 1
(B) 2
(C) 3
(D) 4

(A) 1 & 2
(B) 1 & 10
(C) 0 & 1
(D) 0 & 5

(A) 0.44
(B) 0.55
(C) 0.50
(D) 0.56

(A) 0.62
(B) 0.38
(C) 0.48
(D) 1

(A) 1/52
(B) 1/26
(C) 4/13
(D) 1/13

## Q7) If probability of an event to happen is 0.3 and the probability of event not happening is

(A) 0.7
(B) 0.6
(C) 0.5
(D) None of the above

(A) 1/6
(B) 2/3
(C) 1/3
(D) 1/2

(A) 1/5
(B) 2/5
(C) 3/5
(D) 4/5

(A) 1/25
(B) 2/25
(C) 7/25
(D) 9/25

(A) 2/3
(B) 3/2
(C) 0
(D) 1

(A) 0.25
(B) 0.50
(C) 0.75
(D) 0.80

(A) 0.5
(B) 0.6
(C) 0.7
(D) 0.8

(A) 4/15
(B) 2/15
(C) 1/5
(D) 1/3

(A) 1/6
(B) 1/3
(C) 1/2
(D) 0

(A) 3/16
(B) 5/16
(C) 11/16
(D) 13/16

(A) 7/8
(B) 1/8
(C) 1/7
(D) 6/7

## Q18) The sum of the probabilities of all events of a trial is

(A) 1
(B) greater than 1
(C) less than 1
(D) between 0 and 1

(A) 153/300
(B) 147/300
(C) 174/300
(D) 147/153

(A) 1/5
(B) 1/4
(C) 4/5
(D) 3/4