In a bag, red and blue balls  are in the ratio of 2 : 5 . If the no. of blue balls are  60 , then how many red balls  are there in the bag?

18 24 36 45

24

Ratio of     Red ball      :     Blue ball                     2            :         5  5R = 60    ( given ) 1R = 12  2R = 12 × 2 = 24 Number of Red balls in bag  = 24