Average price of 38 pens is Rs. 25. If 8 new pens are added, then the average price rise by Rs. 4. What is the total price of the 8 new pens?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Rs. 384.
The average price of the 38 pens is Rs. 25.
Therefore, the total price of these 38 pens = 38 × 25 = 950 Rs.
When 8 new pens are added, the average price increases by Rs. 4.
So, the new average price = 25 + 4 = 29 Rs.
The total number of pens now = 38 + 8 = 46
Total price of 46 pens = 46 × 29 = 1334 Rs.
Total price of 8 new pens = 1334 − 950 = 384 Rs.