i think you would add 5+4+3 and 2+3+4 and divide them so 9/12 and that makes your probability which leaves a 3/12 chance non of them are in favour of the book
A rhombus area is height times base because has 2 parralell sides and the area of a paralellogram is found by multiplying height by base (aka width) even though this might not seem wrong, it is correct so area=height times base see attachment below