Please answer the following question by reasoning step-by-step.
The average amount with a group of seven numbers is Rs. 30. If the newly joined member has Rs. 65 with him, what was the average amount with the group before his joining the group?\nOptions:\n(A) s. 25.6\n(B) s. 145/6\n(C) s. 16.6\n(D) s. 26\n(E) s. 25

(B)
Total members in the group = 7\nAverage amount = Rs.

30\nTotal amount with them = 7 * 30 = Rs.

210\nOne number has Rs.

50.

So, the amount with remaining 6 people = 210 - 65 = Rs.

145\nThe average amount with them = 145/6.

Final answer: (B)