A rainy day occurs once in every 10 days. Half of the rainy days produce rainbows. What percent of all the days do not produce rainbow?
Let total number of days=20x
Number of rainy days = 2x
Number of rainbow days = x
Number of non rainbow days= 19x
$$\therefore\ $$ Percentage of non rainbow days = $$\frac{19x}{20x}\ \cdot\ 100\ =95$$
Create a FREE account and get: