2356
48 marbles
at least 39 blue marbles
12 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.
24
48 marbles
at least 39 blue marbles
There are at least 11 green marbles in the bag.
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.
12
100
10 ?
He will have 13 blue marbles and 10 green marbles.
He has 10 green marbles.
10 Green marbles, 13 Blue marbles.
25
56 marbles