The less-than cumulative frequencies of weekly pocket money (in ₹) for 40 students are:
Less than 50: 3
Less than 100: 11
Less than 150: 21
Less than 200: 32
Less than 250: 40
Find the median amount of pocket money.
(a) ₹150
(b) ₹145
(c) ₹125
(d) ₹148