The average weight of 32 students is 70kg. If the weight of the teacher is also included, the average weight of the class becomes 70.5kg. Calculate the weight of the teacher.
- A88.5kg
- B84.5kg
- C82.5kg
- D86.5kg
Solution & Step-by-step Explanation
* Total weight of 32 students:
Total
32
=32×70=2240kg
Total number of people including the teacher = 32+1=33
New total weight with teacher included:
Total
33
=33×70.5=2326.5kg
Weight of the teacher:
Weight=2326.5−2240=86.5kg
Total
32
=32×70=2240kg
Total number of people including the teacher = 32+1=33
New total weight with teacher included:
Total
33
=33×70.5=2326.5kg
Weight of the teacher:
Weight=2326.5−2240=86.5kg