A fruit seller sold big, medium and small apples at Rs 15, Rs 10 and Rs 5 each respectively. The numbers of big, medium and small apples sold were in the ratio 3 : 2 : 5. What is the average selling price of an apple?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Rs 9
When the counts differ, each price is weighted by the number of apples sold at that price; the ratio can be taken as actual numbers.
Take 3 big, 2 medium and 5 small apples, 10 apples in all
Money received \(=3\times15+2\times10+5\times5=45+20+25=90\)
\(\displaystyle \text{Average price}=\frac{90}{10}=9\)
The average selling price is Rs 9 per apple. The plain average of the three prices, Rs 10, ignores how many apples were sold at each price.