I have added the complete question in the attachment
Answer:
15
Step-by-step explanation:
From the diagram in the attachment
27⁰ represents 3 pupils they love PE
135⁰ represents those that love mathematics. But the number was not given.
We have;
27⁰ = 3
135⁰ = ?
We cross multiply to find the unknown
135⁰x3 = 27⁰?
405 = 27⁰?
Divide through by 27
405/27 = ?
15 = ?
Therefore 15 pupils said mathematics was there favorite
