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Solve:A) Find the mean of all prime numbers up to 10.(B) Find the mean proportional between 3 and 27. (C) Divide 81 in to three parts in the ratio 2 : 3 : 4 (D) Given below figure shows a pair of parallel lines cut by a transversal. Find thevalue of a and b, giving reason. |
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Answer» Answer: 1.) The all prime NUMBERS UPTO 30 are 2,3,5,7,11,13,17,19,23,29 sum of these observations=129 Number of their observation=10 Required mean=129÷10=12.9 2.)The mean proportional of 27 and 3 is √27×3=√81=9. 3.)GIVEN ratio=2:3:4 Sum of their ratio=9 1st part=2/9×81=18 2nd part=3/9×81=27 3rd part= 4/9×81=36 4.)Each figure given below shows a pair of parallel lines cut by a TRANSVERSAL For each case, find a and b, giving reasons. |
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