20% of 50 marbles is 1 fifth of the marbles in the bag. so 50 marbles divided by 5 =10 blue marbles
10
250
Ehwhw
12 blue marbles
He will have 13 blue marbles and 10 green marbles.
24
it depends how many blue marbles there are and how many marbles total.
The probability of selecting 4 red marbles or 5 blue marbles depends on how many marbles there are altogether, and how many of the total number of marbles are red and how many are blue.
25
at least 39 blue marbles
12
10 Green marbles, 13 Blue marbles.
12 blue marbles
12 blue marbles
He will have 13 blue marbles and 10 green marbles.
24 red marbles
24
it depends how many blue marbles there are and how many marbles total.
Number of marbles in total = 90 Fraction of marbles are blue = five-ninth Number of blue marbles = five-ninth of ninety = 50 So, the answer is 50 blue marbles.
Set up the problem as: y=number of yellow marbles & 4y=number of blue marbles. 40=y+4y or 40=5y or y=8. Therefore number of blue marbles is 4*8 = 32.