Question

http://prntscr.com/6bwlje

Answer 1

Set up a proportion:

\(\dfrac{80}{500} = \dfrac{x}{25}\)

Answer 2

Multiply 25 to both sides:

\(x = \dfrac{80 \times 25}{500}\)

Simplify that

Answer 3

probably 4 should be the answer from @iGreen calculations

Answer 4

the explanation is that probability of choosing one green marble from the whole lot

Answer 5

@ribhu Let her do the calculations.

Answer 6

then this probability can be multiplied with the required sample size.

Answer 7

@iGreen u didn't explain anything and just wrote the expression, this approach never helps. that was nothing but similar as giving direct answers. not calculations concept is important

Answer 8

OK THANKZ I GOT IT I DID GOT 4

Answer 9

@ribhu It does help..you giving out the answer is giving direct answers..this is not..the asker is participating..