Question

6. 20 cards numbered as 2, 3, 4, .........., 21 are put in
a box and mixed thoroughly. A card is drawn out
of the box without looking at its number. Find the
probability that number on the card is:
(i) an even number
(ii) a prime number
(ii) a number divisible by 3
(iv) a number divisible by 7
(v) a number divisible by 3 or 7
(vi) a number neither divisible 3 nor by 7.
(vii) a single digit number.
(viii) a two digit number.
(W) a two digit number, sum of whose digits in 2
or 3.
(x) a two digit reversible number.​

Answer 1

Answer:

(i) 10/20

(ii) 8/20

(iii) 7/20

(iv) 3/20

(v) 1/20

(vi) 1 sure event

(vii) 7/20

(viii) 13/20

(ix)

Answer 2

Answer:

1)10/20=0.5

2)8/20=0.4

3)7/20

4)3/20

5)9/20

6)9/20

7)8/20

8)12/20

9)4/20=1/5=0.2

10)1/20

Step-by-step explanation:

1)fav.outcome=2,4,6,8,10,12,14,16,18,20

total outcome=20(then apply formula of probability)