# NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 5

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26. In a survey of 364 children aged 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:

(A)

(B)

(C)

(D)

Answer: C

27. In a medical examination of students of a class, the following blood groups are recorded:

| A | AB | B | O |

| 10 | 13 | 12 | 5 |

A student is selected at random from the class. The probability that he/she has blood group B, is:

(A)

(B)

(C)

(D)

Answer: C

28. Two coins are tossed 1000 times and the outcomes are recorded as below:

| 2 | 1 | 0 |

| 200 | 550 | 250 |

Based on this information, the probability for at most one head is

(A)

(B)

(C)

(D)

Answer: C

29. 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:

| 300 | 500 | 700 | 900 | 1100 |

| 10 | 12 | 23 | 25 | 10 |

One bulb is selected at random from the lot. The probability that its life is 1150 hours, is

(A)

(B)

(C)

(D)

Answer: C

30. Refer to Q.29 above:

The probability that bulbs selected randomly from the lot have life less than 900 hours is:

(A)

(B)

(C)

(D)

Answer: D