Four boys and three girls spent an average of ₹120, out of which the boys spent an average of ₹150. What is the average amount spent by the girls?
Four boys and three girls spent an average of ₹120, out of which the boys spent an average of ₹150. What is the average amount spent by the girls?
4 लड़के और 3 लड़कियों ने औसतन 120 रुपये खर्च किए, जिसमें से लड़कों ने औसतन 150 रुपये खर्च किए। तो लड़कियों द्वारा खर्च की गई औसत राशि है |
Detailed Solution & Logic
Correct Answer:
₹. 80
Total people = 4 boys + 3 girls = 7
Average spent by all = ₹120
Total amount = $7 \times 120 = 840$
Boys:
Total spent by boys = $4 \times 150 = 600$
Girls:
Total spent by girls = $840 - 600 = 240$
Average for girls = $240 \div 3 = 80$
Final Answer: ₹80
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