Question

An integey is chosen at random
from I to 1oo. What is the
probability that the number
is not divisible by 7?​

Answer 1

Answer:

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Answer 2

Number of integers between 0 and 100=99

Number of possible outcomes =99

Let E be the event of getting an integer divisible by 7.

Outcomes favourable to E are 7,14,21,28,35,42,49,56,63,70,77,84,91,98

Number of favourable outcomes =14

Let E

1

be the event of getting an integer not divisible by 7.

Number of favourable outcomes =99−14=85

P(E

1

)=

Numberofpossibleoutcomes

Numberoffavourableoutcomes

P(E

1

)=85/99

Hence the probability of getting an integer not divisible by 7 is 85/99.