The meaning of "Average" is
"the number that is calculated by adding quantities together and then dividing the total by the number of quantities"
according to Britannica dictionary.
For this "Before and After" Average question type, the total is not given and the average decreased if some parties were excluded from the count.
This question is very similar to another one published here.(where the average increased instead). More of such "before and after average" questions here.
Such questions are common in P6 Prelim Paper 2.
Calculator usage is allowed.
A group of girls have an average of 66 stickers in their collection.
If 3 girls with an average of 70 stickers stickers were excluded from the group,
the remaining girls will have an average of 64 stickers instead.
How many girls were there in this group?
If the above question is easy, try to do the more challenging question below.
The question below will randomize with different numbers every hour.
Copy below question down before making attempt.
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