Question

A bag contains white marbles and yellow marbles, 16 in total. The number of white marbles is 5 less than 2 times the number of yellow marbles. How many white marbles are there?

Answer 1

9 White marbles are present in the bag.

Explanation:

Let the number of White marbles present in the bag be X and number of Yellow marbles present be Y .

Then according to the question ,

X + Y = 16 -(1) (As total marbles are 16)

Also,

X = 2Y - 5 -(2)

From Equation 1 , X = 16 - Y , Comparing with Equation 2 , we get,

16 - Y = 2Y - 5

3Y = 21.

Y = 7.

So, X = 16 - Y = 16 - 7 = 9.

Thus, 9 White marbles are present in the bag.