Ques 139 : choose the correct answer. A box contains 20 tickets of identical appearance, the tickets being numbered 1, 2, 3, ….., 20. In how many ways can 3 tickets be chosen such that the numbers on the drawn tickets are in arithmetic progression ?
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3 tickets can be chosen such that the numbers on the drawn tickets are in arithmetic progression .
We have to choose it in any way or arithmetic way.
Mark it as brainliest answer.....
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