Question

A bag contains 40 marbles, 4 of which are blue, 10 are red, 25 are green, and 1 is purple. Shawna takes a marble out of the bag, records the color, and returns it to the bag. How many green marbles should she expect after 400 trials?

Answer 1

@Michele_Laino @hartnn

Answer 2

the experimental frequency to get a green marble is:
25/40= 5/8
so the requested number is:
\[\Large \frac{5}{8} \cdot 400 = ...?\]

Answer 3

640?

Answer 4

hint:
\[\Large \frac{5}{8} \cdot 400 = \frac{{5 \cdot 400}}{8} = ...?\]

Answer 5

\[\frac{ 2000 }{ 8 }\]= 25

Answer 6

more precisely it is 250

Answer 7

ok

Answer 8

Can u help me with 3 more?

Answer 9

yes!

Answer 10

here the experimental probability, is given by the subsequent ration:
favorable outcomes/total outcomes:
\[\Large \frac{{272}}{{600}} = ...?\]

Answer 11

ratio*

Answer 12

2.205

Answer 13

whereas the theoretical probability is:
favorable outcomes (= 3, since there are three odd numbers) / possible outcomes(=6, since there are six possible outcomes):
\[\Large \frac{3}{6} = ...?\]

Answer 14

2?

Answer 15

ohhh 1/2 duhhhh

Answer 16

we have:
272/600=0.453
and
3/6=0.5
so what can you conclude?

Answer 17

soit is not likely

Answer 18

we can see that experimental probability is less than the relative frequency

Answer 19

ok Next one ill start a new page...

Answer 20

ok!