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Q: In a bag of 32 marbles there are 12 blue marbles what proportion of the marbles in the bag is blue?

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Sonya has no red blue marbles. All she has are 24 blue, 18 red and 12 green.

12 blue marbles

250 Here's how: 1. Add the ratio: 7 + 5 = 12 2. Divide the total no. of marbles (600) by 12 = 50 3. The total no. of reds = 7 x 50 = 350 4. The total no. of blues = 5 x 50 = 250 (Total blues & reds = 350 + 250 = 600)

A combination problem essentially asks for two answers from different mathematical areas. A simple example could be, "A boy has a bag of marbles. Four marbles are blue. Three marbles are red. Five marbles are white. How many marbles does he have all together? What are the chances of picking a blue marble at random?" The two areas being addressed are simple addition and probability. There are a total of 12 marbles. There is a 1:3 chance of picking a blue marble at random.

There are 8 marbles that aren't black, out of a total of 12 marbles, so the probability is 8/12 or 2/3.

Related questions

Four. The answer will be 12 to 6 which reduced is 2 to 1.

The answer is 7/12. This is because you just have to subtract 5/12 from 1/1 (12/12).

25

Sonya has no red blue marbles. All she has are 24 blue, 18 red and 12 green.

Total ways to draw one = 24Number of ways to draw a blue one = 4Probability of drawing a blue one = 4/24 = 1/6 = 16 and 2/3 percent.

15/27. Simply take the probability of drawing a blue marble.

Probability = number_of_white_marbles / total_number_of_marbles = 10 / (4 + 6 + 4 + 10) = 10 / 24 = 5/12 ~= 0.42

7/12

The number of marbles that can fit into a plastic bag depends on the size of the bag and the size of the marbles. Generally, you could fit hundreds to thousands of small marbles into a standard-sized plastic bag.

12 blue marbles

12 blue marbles

12