Fall sum or same

Find the probability that if you roll two dice, it will fall the sum of 10, or the same number will fall on both dice.

Correct result:

p =  0.2222

Solution:

n1=6:11,22,33,44,55,66 n2=3:46,55,64 n1∩n2:155  p=6+3−16⋅ 6=29=0.2222

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