The average of 30 numbers is 15. The average of first 16 numbers is 12 and that of next 13 numbers is 10. Find the last number. |
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a) |
120 |
b) |
128 |
c) |
130 |
d) |
138 |

The average of 30 numbers is 15. The average of first 16 numbers is 12 and that of next 13 numbers is 10. Find the last number. |
|||||||

a) |
120 |
b) |
128 |
c) |
130 |
d) |
138 |

127