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# S2 exam question help watch

1. Q:https://i.gyazo.com/f6cc719495ae2a79...6c5a692d27.png

A:https://i.gyazo.com/1b22c904da52e9d3...254d2530f8.png

Not sure how to do part b? Why does the area from 1 to k = 0,5?

thanks
2. (Original post by Patrick2810)
Q:https://i.gyazo.com/f6cc719495ae2a79...6c5a692d27.png

A:https://i.gyazo.com/1b22c904da52e9d3...254d2530f8.png

Not sure how to do part b? Why does the area from 1 to k = 0,5?

thanks
Because the area from 0 to 1 is 1/2 and the total area under any pdf is 1. Hence 1-1/2 leaves 1/2 for the area of 1 to k.
3. (Original post by ghostwalker)
Because the area from 0 to 1 is 1/2 and the total area under any pdf is 1. Hence 1-1/2 leaves 1/2 for the area of 1 to k.
thanks

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