SAT Question: Download SAT (Scholastic Aptitude Test) PDF

In how many ways can 5 letters be posted in 3 post boxes, if any number of letters can be posted in all of the three post boxes?

1. 5C3
2. 5P3
3. 53
4. 35

Ans : D

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How many words of 4 consonants and 3 vowels can be made from 12 consonants and 4 vowels, if all the letters are different?	There are 6 boxes numbered 1, 2,...6. Each box is to be filled up either with a red or a green ball in such a way that at least 1 box contains a green ball and the boxes containing green balls are consecutively numbered. The total number of ways in which this can be done is