Question 77
A bag contains marbles of various colours. It is known that all the marbles except 6 are yellow, all the marbles except 7 are red, and all the marbles except 10 are blue. Moreover, there is at least one blue marble, and there may also be marbles of colours other than yellow, red and blue. How many marbles does the bag contain?
(A) It cannot be determined
(B) 11
(C) 12
(D) 20
(E) 23
(A) It cannot be determined
(B) 11
(C) 12
(D) 20
(E) 23