WST01/01, (Edexcel) IAL S1 January 2022, Q7 Discrete Random Variables

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[mustafajunaid]

I’ve got my S1 exam in a couple hours, and I can confidently say that about 95% of my prep came through watching your videos and explanations where ever I got stuck during the last couple months, may god bless you, I can’t thank you enough !!

[maimabhuiyan]

why can't we write P(X=3) = 4/n-3 = 1/38 ? we can fine the value of n and then solve but why do we have to multiply the first 3 probabilities?

[ZohraZahir-zq]

can you please solve January 2023 s1 paper

[rahatshyed]

i think you did a mistake at 5:46, a= F (1) thats wrong.. this is the correct one F (1) = a + b

[Damienbooplays]

Hey mr hassan in question c) u mention that number of green is 14 but in question they said 7 green marbles, can you explain?

[philipchen]

where did the 7/n x 6/n-1 x 5/n-2 = 1/38 come from, for a)