Question
How many meaningful four-letter words can be formed
using the 1st, 3rd, 7th, and 8th letters of the word 'PERIPHERAL'?Solution
The 1st, 3rd, 7th, and 8th letters of the word 'PERIPHERAL' are 'P', 'R', 'E', and 'R', respectively. No meaningful four-letter word can be formed.
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