Unsure what to do for this (Probability higher past paper)

Howdy

.

The mark scheme says the answer is 25 but doesn't really explain how to calculate and I can't figure out what to do :s-smilie:

Howdy

.

The mark scheme says the answer is 25 but doesn't really explain how to calculate and I can't figure out what to do :s-smilie:

http://justmaths.co.uk/wp-content/uploads/2015/12/Probability-H-Probability-2-v2-SOLUTIONS-v2.pdf

Q4 has the solutions to this question, don't have time to look right now, hopefully this helps

Original post by LewisClothier

Thanks, that should be enough to help me :smile:

Thanks, that should be enough to help me :smile:

Not a problem, good luck in your exams!

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