Question

A rainy day occurs once in every 25 days. half of the rainy days produce rainbow. the percentage of days having no rainbow is

Answer 1

In every 25 days we have a rainy day once.

Half of the rainy days produce rainbow.

In 25 days the rainbow appears :

Half of one rainy day.

This is 0.5

The percentage is :

0.5 / 25 × 100 = 0. 02 × 100 = 2%