Mathematics, 10.03.2021 23:30, hanhann6895
Zara has forgotten her 4-digit PIN code. She knows the first digit is a prime number and the 4 digits make a number divisible by 2. How many different sets of 4 digits could it be?
Answers: 2
Mathematics, 21.06.2019 20:50, kidpryo1
There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?
Answers: 1
Zara has forgotten her 4-digit PIN code. She knows the first digit is a prime number and the 4 digit...
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