exam Maths Puzzle Numerical Ability

What is the probability of drawing a yellow marble or a red marble from a bag containing 12 yellow marbles, 16 red marbles, and 15 green marbles?

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exam Other Question

Jay flew an airplane 500km against the wind in the same time it took him to fly it 600km with the wind. The speed of the wind was 20km/h. What was the average speed of the airplane? Three numbers are in the ratio 2:4:7. If the first number is multiplied by 4, the result is 9 less than the sum of the other two. find all three numbers.