Question

Eighty five children went to amusement park where they could ride on merry go-round roller coaster and ferris wheel .It was known that 20 of them have took all three rides and 55 of them have taken at least two of the three rides. Each ride cost rs.1 and the total receipt of the amusement park was rs.145.

Answer 1

Answer:

15 children did not try any of the rides.

Step-by-step explanation:

There are:

- 20 kids who took all 3 rides,

- 55 kids who took at least 2 rides.

That means that 35 kids took 2 rides and 20 took 3 rides.

So : 2 * 35 + 3 * 20 + x = 145

70 + 60 + x = 145

x = 145 - 130 = 15 ( the number of kids who took 1 ride )

Finally : 85 - ( 15 + 35 + 20 ) = 85 - 70 = 15 ( did not try any of the rides )