Question

1) How many arithmetic progressions with 10 terms are there whose first term is in the set {1,2,3} and whose common difference is in the set {2,3,4}?

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2) A mint prepares metallic calendars specifying months, dates and days in the form of monthly sheets (one plate for each month). How many types of February calendars should it prepare to serve for all the possibilities in the future years?

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3) In how many ways can 6 letters be posted in 5 letter boxes available in the locality?

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its urgent, please answer all the questions :-D.....??

Answer 1

sorry I couldn't answer this QN because I am 8th standard