Question

20 cards 1,2,3,4,5_ _ _ 20 are put in a box and mixed throughly one person draw a card from the box find th probaliti that the number on the card is
1) a prime
2) divisible br 3​

Answer 1

Step-by-step explanation:

1/2

3/10

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Answer 2

Answer:

(i) if it's a prime number

C={1,2,3,5,7,11,13,17,19}

n(C) =9

P(C) =n(C) /n(S)

9/20.

(ii) if the number is divisible by 3.

D={3,6,9,12,15,18}

n(D) =6

P(D)=n(D)/n(S)

6/20

2\10

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