Question

the bag there are 10 balls, numbered 1 to 10. A ball picked at random; find the probability for picking the following
a) Number 7
b) An even number
c) An order number
d) A prime number
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Answer 1

Answer:

1-7/10

2.5/10 that means 1/2

3.5/10 that means 1/2

4.4/10that means 2/5