Question

In a survey of 100 persons it was found that 28 read magazine a , 30 read magazine b , 42 read magazine c , 8 read magazine a&b , 10 read magazine a&c , 5 read magazine b&c , & 3 read all three magazine . 1) hiw many read none of three magazine ? 2) how many read magazines c only?

Answer 1

Answer:

1) 0 will be the answer

2) 42/100= 21/50