The average of 5 odd numbers is 27. What is the product of the first and last numbers?

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5 ഒറ്റ സംഖ്യകളുടെ ശരാശരി 27 ആണ്. ആദ്യത്തേയും അവസാനത്തേയും സംഖ്യകളുടെ ഗുണനഫലമെന്താണ്?

A621

B667

C713

D730

Answer:

C. 713

Read Explanation:

[x + (x + 2) + (x + 4) + (x + 6) + (x + 8)]/5 = 27 x + (x + 2) + (x + 4) + (x + 6) + (x + 8) = 135 5x + 20 = 135 5x = 115 x = 23 ഗുണനഫലം = 23 ⨯ [23 + 8] = 23 ⨯ 31 = 713

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