Question

A box contains 36 marbles . one third of the marbles are green , 1/4 of them are yellow and the rest are red. How many are red marbles are there ?

Answer 1

To find the number of red marbles, subtract the number of green and yellow marbles from the total number of marbles in the box.

Step-by-step explanation:

To find the number of red marbles, we need to subtract the number of green and yellow marbles from the total number of marbles in the box. Given that one-third of the marbles are green and one-fourth of them are yellow, we can calculate:

Number of green marbles = (1/3) * 36 = 12

Number of yellow marbles = (1/4) * 36 = 9

Total number of red marbles = Total number of marbles - Number of green marbles - Number of yellow marbles

Total number of red marbles = 36 - 12 - 9 = 15

Therefore, there are 15 red marbles in the box.

Answer 2

Answer: 15

Reason

1/3 + 1/4 = 4/12 + 3/12 = 7/12 of the marbles are either green or yellow.

The remaining 5/12 are red since 7/12 and 5/12 add to 12/12 = 1.

5/12 of 36 = (5/12)*36 = 15 marbles are red