A medium sized apple has 70 calories this 10 calories less than one-fourth of the calories in the old Westie chocolate bar. we need to find out how many calories are in a chocolate bar

70 + 10 = one fourth of the chocolate bar

80*4 = 320 calories in the chocolate bar

320 calories

Step-by-step explanation:

Given that the medium sized apple has 70 calories this 10 calories less than one-fourth of the calories in the old Westie chocolate bar, considering the later part of the sentence,

10 calories less than one-fourth of the calories in the old Westie chocolate bar can be expressed mathematically as

(1/4) x - 10 where x is the calories in the old Westie chocolate bar. As such, it means that

(1/4) x - 10 = 70

1/4) x = 80

x = 80 * 4

= 320 calories

a chocolate bar has 320 calories