7. The average monthly earning of 4 people is *18500. Another member joins the group. Now the average earning is * 18700. Find the monthly earning of the fifth member.
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Answer:
19,500
Step-by-step explanation:
Average monthly earnings of 4 members [(a + b + c + d) / 4] = 18
Total monthly earning of 4 members (a+b+c+d)=74,( (ie.18,500×4)
When a new member joins,
Average monthly earnings of 5 members [(a+b+c+d+e)/5] = 18,700
Total monthly earnings of 5 members (a+b+c+d+e) = 93,500(ie. 18,700x5)
Monthly earning of new member = 93,500-74,000
=19,500
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