9 person went to a hotel for taking meal. 8 of them spent ram 120 on their meal and 9th spent r 80 more than the average expenditure of all the 9
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Let the average be ₹ a.
Total expenditure = ₹ 9a.
Money spent by 9th = ₹ (a+80).
And by rest 8 persons = ₹ 8×120
= ₹ 960
Clearly,
₹ (a+80)+960 = ₹ 9a
=> 8a = 1040
=> a = 130
Therefore, average expenditure = ₹ a = ₹ 130. [Answer]
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Total expenditure = ₹ 9a.
Money spent by 9th = ₹ (a+80).
And by rest 8 persons = ₹ 8×120
= ₹ 960
Clearly,
₹ (a+80)+960 = ₹ 9a
=> 8a = 1040
=> a = 130
Therefore, average expenditure = ₹ a = ₹ 130. [Answer]
Hope this helps. Please comment for more clarification and discussion.
For more you may follow me.
Thanks!
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