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A number is chosen from 1 to 20. P(multiple of 5) = $\frac{4}{20}$ . What is P(not a multiple of 5)?

Class 10Complementary EventsStatistics

A $\frac{16}{20}$
B $\frac{4}{20}$
C $\frac{15}{20}$
D $\frac{5}{20}$

Step-by-Step Solution

Multiples of 5 in 1-20 are 5,10,15,20 (4 of them). P(not multiple)

= 1 - \frac{4}{20} = \frac{16}{20}

.

Answer: A)

\frac{16}{20}

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