PROBABILITY Class IX

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Quiz 1 Compiled By Mrs. Pintu Prasad

1. In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is :

2 points

(A) 0.5

(B) 0.6

(D) 0.8

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2. In a survey of 364 children aged 19-36 months, it was found that 91 liked to eat potato chips. If a child is selected at random, the probability that he/she does not like to eat potato chips is

2 points

(A) 0.25

(B) 0.50

(D) 0.80

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3. In a medical examination of students of a class, the following blood groups are recorded. A student is selected at random from the class. The probability that he/she hasblood group B, is

2 points

(A)1/4

(B)13/40

(D)1/8

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4. Two coins are tossed 1000 times and the outcomes are recorded as below.Based on this information, the probability for at most one head is

2 points

(A)1/5

(B)1/4

(D)3/4

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5. . 80 bulbs are selected at random from a lot and their life time (in hrs) is recorded in the form of a frequency table given below .One bulb is selected at random from the lot. The probability that its life is 1150hours, is

2 points

(A)1/80

(B)7/16

(D) 1

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6. Refer to Q.5 above :The probability that bulbs selected randomly from the lot has life less than 900hours is

2 points

(A)11/40

(B)5/16

(D)9/16

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7. A dice is thrown 1000 times and the outcomes were recorded as follows :If the die is thrown once more, then the probability that it shows 5 is

2 points

(A)9/50

(B)3/20

(D)7/25

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8. 5 coins are tossed together . What are the total outcomes?

2 points

(A) 25

(B) 16

(D) 64

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9 What are the total outcomes when 3 dice are thrown together?

2 points

(A) 6

(B) 36

(D) 216

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10. What is the probability tha the card drawn is a face card ?

2 points

(A) 1/13

(b) 4/13

(d) 9/52

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