Question

In a survey, 3/14 like only Maths and 70 don't like maths .
9/14 like science but 20 like none of them.
Find how many children like both subjects?
Please answer fast .. No need to describe . Just answer by direct using formula.
ANS=40

Answer 1

Step-by-step explanation:

$3 \times 14 \div 100 = 0.42 \\ 9 \times 14 \div 100 = 1.26t \\ \: then \: 70 \times 20 = 140 - 100 = 40$

Is the right answer.