Since there are 10 odd numbers (1, 3, 5, 7, 9, 11, 13, 15, 17, 19) in the 20 numbers (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20), the probability of picking an odd number in a random sample is 10 in 20, or 1 in 2, or 0.5.
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There are 20 odd numbers in 40.
how many odd numbers is there between 20 and 158
20 of them.
9 and 11
'5' & '15' are odd numbers less than 20 , and are also multiples of '5'.