**14/15**

Number of ways of selecting 2 letters of word STUPID- 2*(5+4+3+2+1)=30

Number of ways selecting 2 vowels- 2 (UI & IU)

Probability- (30-2)/30=28/30= 14/15

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If two letters are taken at random from word STUPID, what is the probability that none of the letters would be vowels?

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