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1). 58°C2). 64°C3). 51°C4). 69°C |
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Answer» We know that: $(Average = \frac{{SUM\ of\ ELEMENTS}}{{number\ of\ elements}})$ ⇒ Monday + Tuesday + Wednesday + Thursday = 58 × 4 = 232 ________ (1) ⇒ Tuesday + Wednesday + Thursday + Friday = 60 × 4 = 240 ________ (2) ⇒ Monday : Friday = 7 : 8 ⇒ Monday = 7/8 × Friday_________(3) Now, subtracting equation (1) from equation (2), we get ⇒ Friday - Monday = 8 ⇒ Friday - 7/8 × Friday = 8(from equation 3) ⇒ Friday = 8 × 8 = 64 ∴ Temperature on Friday was 64°C |
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