Question

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a number is selected ramdomly from 10 to 100 find the probability of
1.getting 2 digit number
2.getting a number multiple of 5
3.getting a 2 digit number in which sum of the 2 digit is 8

Answer 1

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Answer:

(i) 90/91

(ii) 19/91

(iii) 8/91

Step-by-step explanation:

experiment: selecting a number randomly from 10 to 100.

no. of total possible outcomes = 91

(i) event : getting 2 digit number

no. of favourable outcomes = 90

          no. of favourable outcomes for the event

P(E) = ---------------------------------------------------------------

                no. of total possible  outcomes.

P(E) = 90/91

(ii) event : getting a number multiple of 5

no. of favourable outcomes = 19

          no. of favourable outcomes for the event

P(E) = ---------------------------------------------------------------

                no. of total possible  outcomes.

P(E) = 19/91

(iii) event : getting a 2 digit number in which sum of the 2 digit is 8

no. of favourable outcomes = 8

          no. of favourable outcomes for the event

P(E) = ---------------------------------------------------------------

                no. of total possible  outcomes.

P(E) = 8/91

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Answer 2

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