MadeEasy Test Series: Probability

Question

Comments

A) should be the correct answer.

Answer 1

Total number of possible combinations = 3*3 = 9
r = 2  (1,1)
r = 3  (1,2) , (2,1)
r = 4  (1,3) , (2,2) , (3,1)
r = 5  (3,2) , (2,3)
r = 6  (3,3)

P(r >=4) = 6/9
P(r <=4) = 6/9
P(r <=3) = 3/9
P(r > 5)  = 1/9
P(r =4)   = 3/9
P(r >=4) = P(r <=4) = 6/9
Option A is correct

Comments

I didn't understand the question can u plz explain it?

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Imagine 2 rotating fidget spinners and just take the sum of the numbers which come at the wings that are relatively upper than the others.
 

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yeaah i got it thnxx