Question

The average price of 20 pens decreases by 1 when a new pen price rs.50 is included and an existing pen is removed from the bunch. Find the price of the pen that is removed from the bunch

Answer 1

Dear Student,

◆ Answer -

y = 70 Rs

● Explanation -

Let x be average price of 20 pens.

Total price = 20x

When old pen of price y is removed and new pen of Rs 50 is added,

Total price = 20x-y + 50

Average price now is -

x-1 = (20x-y+50)/20

20x - 20 = 20x - y + 50

y = 50 + 20

y = 70 Rs

Hence, the price of the pen that is removed from the bunch was Rs 70.

Thanks dear. Hope this helps you..