From the given diagram , we can see that
Number of teachers who are also singers = 9

Correct Option: C

From the given diagram , we can see that
Number of teachers who are also singers = 9
Hence , 9 teachers are also singers.

According to question ,
Let us assume Number of Kannada = K , Number of Tamil = T and Number of Telugu = Te
Here , n(K) = 11; n(T) = 20; n(Te) = 11
n(K ∩ T ∩ Te) = 1
n(K ∩ T) = n(T ∩ Te) = n(Te ∩ K) = 2
n(K U T U Te) = n(T) + n(K) + n(Te) - n(K ∩ T) - n(T ∩ Te) - n(Te ∩ K) + n(K ∩ T ∩ Te)

Correct Option: C

According to question ,
Let us assume Number of Kannada = K , Number of Tamil = T and Number of Telugu = Te
Here , n(K) = 11; n(T) = 20; n(Te) = 11
n(K ∩ T ∩ Te) = 1
n(K ∩ T) = n(T ∩ Te) = n(Te ∩ K) = 2
n(K U T U Te) = n(T) + n(K) + n(Te) - n(K ∩ T) - n(T ∩ Te) - n(Te ∩ K) + n(K ∩ T ∩ Te)
n(K U T U Te) = 20 + 11 + 11 - 2 - 2 - 2 + 1 = 37

According to question , we can say that
Food and Curd belong to same class , but Spoons belong to other class .

Correct Option: D

According to question , we can say that
Food and Curd belong to same class , but Spoons belong to other class .
From above it is clear that required answer will be option D .So , option D is correct .

Given :- Total population = 70,
Drinking coffee and tea = 20 and drinking coffee = 35
(1) 35 drink only coffee .
(2) 15 drink only tea .

Correct Option: D

Given :- Total population = 70,
Drinking coffee and tea = 20 and drinking coffee = 35
(1) 35 drink only coffee .
(2) Drinking only tea = Total population - ( Drinking coffee and tea + Drinking coffee ) = 70 - ( 20 + 35 ) = 15
∴ 15 drink only tea .

From above given diagram , it is clear that
P and K is nothing but R.

Correct Option: A

From above given diagram , it is clear that
P and K is nothing but R.
Therefore , required answer will be option A .