Deepti sells a pen to Vrinda at a gain of 30% and Vrinda sells it to Chitra at gain of 20% and Chitra sells it to Vandana at a gain of 12.5%. If Vandana pays Rs. 17.55, what did the pen cost to Deepti?
Rs. 2310 is to be divided among A, B and C in such a way that if A gets Rs. 7, then B must get Rs. 12 and if B gets Rs. 4, then C must get Rs. 6.50. The share of C will exceed to that of B by