A man invests half his capital at the rate of 10% per annum, one third at 15% and the rest at 24% per annum. The average rate of interest per annum, which he gets, is
1
9%
2
10%
3
14%
4
12%
A man invests half his capital at the rate of 10% per annum, one third at 15% and the rest at 24% per annum. The average rate of interest per annum, which he gets, is