Question: trying to show my students a level 4 work. for following questions 1) How many ways are there to arrange the letters in 4) How
trying to show my students a level 4 work. for following questions

1) How many ways are there to arrange the letters in 4) How many 7-digit numbers less than 6000000 can the word BIOCHEMIST? be formed using the digits (2,3,5,6,7,8,9). Repetition now allowed 2) How many ways can a family of 7 line up if Jack, 5)Jack has 15-t shirts. He is considering taking at least Alex, and May must not be side by side. 3 t-shirts with him on vacation. How many options does he have
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