Year 12s: what will be the first way you research your future options? >>

S1 problem/question... should be REALLY EASY!

this should be really simple i think, it is question e).... i get all the other stuff but this really stumped me and the mark scheme isn't helping! i just need a quick explanation. the pic should be attached, i highlighted the question..

thanks!

helllllllp.jpg35.7KB

Reply 1

vc94

P(x>=y) = p(x>= 6-2x) = p(x>=2)

Reply 2

anna258

Original post by helloe123

do you just input the Y=6-2X into the inequality? i don't know though :/

Reply 3

helloe123

Original post by vc94

P(x>=y) = p(x>= 6-2x) = p(x>=2)

thanks but what value do i put in for x when doing 6-2x? do i just try them all (x=-1, 0, 1, 2, 3) and then use the ones where x value is bigger than the answer i get?

Reply 4

vc94

Original post by helloe123

thanks but what value do i put in for x when doing 6-2x? do i just try them all (x=-1, 0, 1, 2, 3) and then use the ones where x value is bigger than the answer i get?

X>=Y means X>= 6-2X, rearrange, this means X>=2

So find P(X>=2)

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