The Mathematics Club in a school held an open house on three afternoons. 115, 75 and 110 students attended on the first, second and third afternoons respectively. 30 attended only on the first day, 35 on the first and second days. 70 attended the first and the third days and 35 attended on the second and third
days. How many attended on all the three days?
(A) 15
(B) 25
(C) 21
(D) 20
(E) 30![]()
days. How many attended on all the three days?
(A) 15
(B) 25
(C) 21
(D) 20
(E) 30