Question

there are balls of colors red, blue and green. 65 students of a class like exactly one color, 10 students like no color, 40 students like exactly 2 colors and 15 students like all the 3 colors
1. how many students are there in the class.
2.how many students like atleast 2 colors.
#1: 10+65+40+15 = 130
#2: 40+15 = 55
1: 65+10+40+15=130
2:40+15=55

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