please solve it
If you I will mark as brain list
Attachments:

Answers
Answered by
1
Let M, P and C denote the students studying Mathematics, Physics and
Chemistry
And U represents total students
So, n(U)= 200,
n(M) = 120, n(P) = 90
n(C) = 70, n(Mn P) = 40, n(Pn C) = 30 n(Mn C) = 50, n(M UP UC)' = 20
...n(M UP UC) = n(U) - n(MUP UC)
→ 20 = 200 − n(M UP U C)
= n(M UP U C) = 180
→ n(M UP UC) = n(M) + n(P) + n(C)
-n(Mn P) - n(P n C) - n(C nM) + n(C n
Mn P)
.. 180 = 120 +90 + 70 - 40 - 30 - 50 + n(C n
→ 180 = 280 - 120 + n (C n Mn P)
→ n(P n C n M) = 300 - 280 = 20
Hence, the number of students studying all three subjects is 20.
Similar questions