A bag contains red and blue marbles. In a representative sample of 10 marbles, there are 5 red marbles. If the bag has 180 marbles, predict the number of red marbles in the bag.

Question

A bag contains red and blue marbles.  In a representative sample of 10 marbles, there are 5 red marbles.  If the bag has 180 marbles, predict the number of red marbles in the bag.

Tyrion · Answer

do you have an idea on wat the answer is?

AZ · Answer

There are 5 red marbles out of 10 marbles

How many red marbles are there if you have 180 marbles?

You can come up with a proportion to solve this:

We're trying to find the number of red marbles in the bag of 180 marbles, so let's call that 'x'

$\dfrac{5}{10} = \dfrac{x}{180}$

Can you solve for x? 
All you have to do is cross multiply

daddysbabygirl · Answer

900 and then divide by 10

daddysbabygirl · Answer

@Tyrion

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