HMCS Vancouver Pre-Deployment Brief - May 2024 (Web Version).pptx
Period 4
1.
2.
3. Classes Number of children Number of books average
6A 30 120 4
6B 40 240 6
6C 35 175 5
6D 32 320 10
4.
5. The average age f a child in a class of 35
= 11
Total age of 35 children
= 11 X 35 = 385
The average age including the teacher
= 12
Total age of 35 children and teacher
= 12 X 36 = 432
Age of teacher
= 432 – 385 = 47
6.
7. The average weight of a kid in a group of 10
= 35 kg
Total weight of 10 kids
= 10 X 35 = 350 kg
When Sonu also joined, then the average weight
= 36 kg
Total weight of children and Sonu
= 11 X 36 = 396 kg
Weight of Sonu
= 396 – 350 = 46 kg
8.
9. If a 35 year old teacher is transferred there is no
change in the average age of remaining 7 teachers. A
new teacher joined, the average was increased by 2
years. So the increased age of 7 teachers added to
the age of a new teacher. Also 2 is added to the age
of the transferred teacher.
So the age of the new teacher,
= 7 X 2 + 35 + 2
= 14 + 37
=51
