Let C and T denotes the students who play cricket and tennis, respectively.
Given,
n(c) = 110, n(T) = 160, n(C ∩ T) = 70, n(u) = 450.
Using identity,
n(C ∪ T) = n(C) + n(T) − n(C ∩ T)
= 110 + 160 – 70
= 200
∴ No, of students play neither cricket nor tennis
n(u) − n(C ∩ T)
= 450 – 200
= 250