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The average of five positive numbers is 213. The average of the first two numbers is 233.5 and the average of last two numbers is 271. What is the third number?

(a) 64 (b) 56 (c) 106 (d) Cannot be determined (e) None of these

  • Deepshikha
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4 Answers

  • 56

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  • The sum of five numbers = 5*213=1065 The sum of first two numbers = 2*233.5=467.0 The sum of the last two numbers=271*2=542 Third number = 1065-(467+542) =56

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  • strongAns is option (b) 56/strongbr /strongExplanation:/strongbr /The sum of the five numbers = 5 × 213 =1065br /The sum of the first two numbers = 2 × 233.5 = 467br /The sum of  the last two numbers = 542br /Then the sum of the four numbers = 467 + 542 =1009br /So, the third number will be = 1065 – 1009br /                                         = 56

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  • The sum of the five numbers = 5 × 213 =1065br /The sum of the first two numbers = 2 × 233.5 = 467br /The sum of  the last two numbers = 542br /Then the sum of the four numbers = 467 + 542 =1009br /So, the third number will be = 1065 – 1009 = 56. strongAns./strong

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