Question

A box contains 12 balls of which some are red in colour if 6 more red ball are put in the box and a ball is drawn at random the probability of drawing a red ball doubles then what it was before find the number of red balls in bag.

Answer 1

t he answer is 6 because the challenge was to draw out double red balls at a time from the box

Answer 2

please give me the hcf of 60 and 90