exam Maths Puzzle Numerical Ability

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.

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exam Other Question

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? (~(8))/(~4:(8)) need help PLEASE - need to put in simplest form

2~5:(4)*3~5:(56) need to put in simplest form - HELP!!!

~6:((1)/(3)) - same thing
THANKS

LLO