Question

In January, the New York Stock Exchange rose 67 points. In February, It fell 109 points. In March, it rose again 37 points. How much would the Exchange have to

gain or lose during April In order to have an average galn over the four months of +20 points?​

Answer 1

The exchange has to gain by +85 points in the month of April.

Explanation:

The New York Stock Exchange changes by +67 points in January, then it changes by -109 points in February and then in the month of March it changes by +37 points. {Here -ve sign means loss and +ve sign means gain}

Let us assume that in the month of April the Exchange has to change by x points to get an average change of +20 points for the given four months.

So, we can write that, (+67-109+37+x)/4 = +20

⇒(-5+x) =20×4

⇒ x=80+5 = +85

Therefore, the exchange has to change by +85 points in the month of April. (Answer)