Question

35 children of a class drawn a map of 26 use blue colour and some use green colour,19 use both the colour find the no. Of children who use grren colour

Answer 1

Total children = 35
No: of blue colour users = 26
No: who uses both colours = 19
No: of green colour users = x
35 = 26 + x - 19 [from the concept of venn diagram or set theory]
x = 28.
28 children use green colour.