Question

two digit number are form by the digit 2,3,5,7,9. to find probability of getting odd number and multiple of 7

Answer 1

Total Number taking two digits together = 5 x 4                                                          = 20  For odd number unit digit should be 3,5,7,9        Total possible number = 16            Probability = 16/20 = 4/5 = 0.8 Number is divisible by 5 only when unit place is 5 so only total five number possible P= 5/20 = 1/4 = 0.25