A Man sells chips

Question

The price of a small chip is $1.50 and a large chip is $2.00. The price of each small chip rises by 10% and each large chip by 5%. What is the percentage increase in the total cost of 2 small chips and 1 large chips??

Answer 1

1.5 up by 10% = 1.65

for 2 chips that's 3.30

2 up by 5% is 2.10

3.30+2.10 = $5.40

originally they cost 2(1.5)+2 = $5

5 to 5.40 is an 8% increase

.40/5 = .08 = 8%

one went up by 10% the other by 5%, the total cost increase is somewhere between 5 and 10%. with two of the 10% and just one of the 5%, that's weighted double towards the 10%. 8 is closer to 10 than to 5. Answer of 8% looks like it's in the right range