Ashish has earned an average of 4200 dollars for first eleven months of year. If he justifies his st

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Ashish has earned an average of $4200$ dollars for the first eleven months of the year. If he justifies his staying on in the US on the basis of his ability to earn at least $5000$ dollars per $month$ for the entire $year,$ how much should heearn (in $dollars$) in the last $month$ to achieve his required average for the whole $year$ ?

A

$14600$

B

$5800$

C

$12800$

D

$13800$

Solution

Ashish total earnings of $11$ months

$=4200 \times 11=46,200 $

Total earnings to be needed for $12$ $months$.

$=5000 \times 12=60,000 $

Last month earnings $=60,000-46,200=13,800 $

Standard 13

Quantitative Aptitude

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