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What is the average of all numbers between 8 and 74 which are divisible by 7?1). 402). 413). 424). 43 |
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Answer» First number to be DIVISIBLE by 7 in this range = 14 Last number to be divisible by 7 in this range = 70 This is an AP with DIFFERENCE = 7 Let the total NUMBERS in this AP be n ⇒ Average = Sum of AP/total numbers ⇒ Average = [n/2(last term + first term)]/n ⇒ Average = (last term + first term)/2 ∴ Average = (14 + 70)/2 = 42 |
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