Question

In a class of 50 students , 35 like Physics , 30 likes Maths and 3 like none of the subject . How many students like only Physics ?
a. 17 b. 18 c. 15 d. 16​

Answer 1

Answer:

In a class of 50 students , 35 like Physics , 30 likes Maths and 3 like none of the subject . How many students like only Physics ?

a. 17 b. 18 c. 15 d. 16

Step-by-step explanation:

is a

Answer 2

Answer:

n(u) = 50

n(p) = 35

n(m) = 30

n(pum)' = 3

now,

n(u)= n(p)+n(m)-n(pnm)+n(pum)'

50= 35+30-n(pnm)+3

50=68-n(pnm)

n(pnm)=68-50

n(pnm)=18

again,

no(p) = n(p)-n(pnm)

=35-18

17