Question

10 teachers of a college either teach mathematics or physics. 6 of them teach mathematics while 2 teach both the subjects. Then the number of teachers teaching physics only is

Answer 1

Answer:

4 are those who teach math only

4 are those who teach physics only

2 are those who teach math & phy both

Step-by-step explanation:

6 of teaches teach mathematics (it includes those who teach math only + those who teach math & phy both)

2 teach both the subjects

therefore,

those who teach math only = 6 - 2 = 4

So

those who teach physics only = 10 - (4 + 2) = 10 - 6 = 4

Answer 2

Answer is attached.Hope it helps you.