How many different number-plates for cars can be made if each number-plate contains four of the digits 0 to 9 followed by a letter A to Z, assuming that repetition of digits is allowed?  Select the correct option.
A) 2.6 * 10^4  B) 2.6 * 10^5  C) 26 * 10^5  D) 26 * 10^4  E) 30 * 10^4
With repetition, we have simply:   (number of digits from 0000 to 9999)times×26 = 10 * 10 * 10 * 10 * 26   = 10^4 * 26   = 2.6 * 10^5   Ans- 2.6 * 10^5
<result>B</result>
How many different number-plates for cars can be made if each number-plate contains four of the digits 0 to 9 followed by a letter A to Z, assuming that repetition of digits is allowed?