ambujsrv wrote:
just a question. How is the value of total number of pens important for finding out the probability and even percentage can give us the probability.
For me, both the options are sufficient.
Please correct if i am wrong in my concept.
see we are given the percentage and not the actual number. we cannot assume the total no. to be 100 even tgough the first statement conforms to that. 17/25 can very well be 68/100 (in which case total pens would be 100) and it can very well be 136/200 (in which case the number of pens is 200).
maybe you thought that in the end we have to get a ratio but actually, the common multiple in the ratio plays a crucial role.