Question

to find the probability of units digit of telephone number of one page of a telephone directory
please give me answer​

Answer 1

Answer:

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Step-by-step explanation:

Total number of phone numbers = 200

(i) We know that Number of phone numbers with 5 = 24

So we get

Required probability = number of phone numbers with 5/ Total number of phone numbers

By substituting the values Required probability = 24/100 = 0.12

(ii) We know that Number of phone numbers with 8 = 16

So we get

Required probability = number of phone numbers with 8/ Total number of phone numbers

By substituting the values Required probability = 16/200 = 0.08