the average cost of 3 erasers was Rs.3.45. the average cost of the first 2 erasers was Rs.3.15. find the cost of the third eraser.
Answers
Answered by
0
Answer:
Step-by-step explanation:
Three eraser cost - two eraser cost = third cost
3.45-3.15=0.30
Answered by
1
Answer:
Rs. 4.05
Step-by-step explanation:
a+b+c÷3=3.45 (given)
a+b÷2=3.15
a+b=3.15×2
a+b=6.30
putting the value of a+b in the given equ.
6.30+c÷3=3.45
6.30+c=3.45×3
6.30+c=10.35
c=10.35-6.30
c=4.05 (answer)
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