HocusPocus1305 HocusPocus1305

17-05-2021
Mathematics

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There are letter tiles in a bag. Four A's, five B's, six C's and five D's. You select one tile, replace it, and then draw another. P( C and D)=____

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topeadeniran2 topeadeniran2

18-05-2021

Answer: 3/40

Step-by-step explanation:

Number of A's = 4

Number of B's = 5

Number of C's = 6

Number of D's = 5

Total number of letters tiles = 20

Probability of selecting C = 6/20 = 3/10

Probability of selecting D = 5/20 = 1/4

P( C and D)= 3/10 × 1/4 = 3/40

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