Question

A box contains 80 marbles. 40% of the marbles are blue, 25% of the marbles are yellow and the

rest of the marbles are red in colour. How many red marbles are there in the box?
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Answer 1

Answer:

ANSWER

A box contains 32 coloured marbles. 8 of them are red marbles and the rest are either blue or green marbles. A marble is drawn at random.  the probability of drawing a marble which is not red in colour. 

The marbles not in red color are 32−8=24

Then probability of not drawing red marbles isP(E)=3224=43

Answer 2

Answer:

red marbles = 80-40%+25%

Step-by-step explanation:

80×65%

80×65/100

8×6.5=52 these are marbles of blue and yellow in total

red marbles = 80-52=28 is the no. of red marbles in total