Lalit's average earning per month in the first three months of a year was ₹37096. In April, his earning was 50% more than the average earning in the first three months. If his average earning per month for the whole year is ₹87305, then what will be Lalit's average earning (in ₹) per month from May to December?

Correct option is B

Given:

Lalit's average earning in the first three months = ₹37,096

Lalit's earning in April = 50% more than the average earning of the first three months.

Earning in April=1.5×37,096 =55,644

Lalit's average earning for the whole year = ₹87,305

Formula Used:

Total earning for the year= 12 × Average earning for the year

Total earning from May to December = Total earning for the year - Total earning from January to April

Average earning from May to December = $$\frac{\text{Total earning from May to December}}{8}$$​​

Solution:

Total earning for the year:

12×87,305=1,047,660

Total earning from January to April:

(3×37,096) + 55,644=111,288 + 55,644 =166,932

Total earning from May to December:

1,047,660 − 166,932=880,728

Average earning from May to December:

​$$\frac{880,728}{8} = 110,090.98 \approx 110,091$$​

Lalit's average earning per month from May to December is ₹110,091.

Option (B) is right.