Question

How many strings can be formed from the letters of the word ARTICLE,so that vowels occupy the even places?

Answer 1

Seven positions three vowels ,so we have to arrange them in 2nd or 4th or 6th this can be done in 3! Ways, rest alphabet s can be arranged in 4! Ways ,so we can arrange them in 4!*3!

HoPe iT HeLpS!