ProbabilityHard
Question
If 4 whole numbers taken at random are multiplied together, then the chance that the last digit in the product is 1, 3, 7 or 9 is:
Options
A.16/625
B.4/125
C.8/81
D.none
Solution
At end of any number there could be 10 possible digits n (S) = 10 × 10 × 10 × 10 to get last digit of product 1, 3, 7 or 9, end place should be occupid by these digits only
Hence n (E) = 44 P =
Hence n (E) = 44 P =
Create a free account to view solution
View Solution FreeMore Probability Questions
A problem in mathematics is given to three students A, B, C and their respective probability of solving the problem is a...There are n letters and n addressed envelopes. The probability that all the letters are not kept in the right envelope, ...A, B and C are three mutually exclusive and exhaustive events and P(B) = P (A), P(C) = P(B) then the value of P (A) is-...The correct statement for any event A is -...A die is thrown such that the probability of throwing the number i(1 ≤ i ≤ 6) is proportional to its recipro...