exam Maths Puzzle Numerical Ability

Construct a probability distribution for the following:
(a) Construct a probability distribution for drawing a card from a deck of 40 cards consisting of 10 cards numbered 1, 10 c

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Hi

I have a ratio problem I could use some help with.

If the ratio of boys to girls was 9 to 3 and there are 108 students total, how many boys are there?

Thank you,
Dawn Can someone help me with this one.
Determine whether the graphs of the equations are parallel lines, perpendicular lines or niether.
3x - 8y = -18
32x + 12y = -18
Thank you!