IBPS PO Exam 2012 Solved Paper

By options
(a) Either 12 or 13
then ice-creams should not be given atleast 9. This can be rejected.
(b) Either 11 or 12
Ice-cream should be atleast 9. By this combination ice cream gets less than 9.
(c) Either 10 or 11
By giving cookies 10 or 11, we get all the possible condition fulfilled.
(d) and (e), the ice-cream distribution can be more than cookies which violates our condition.
∴ option (c) is the write answer.