The average rainfall for a week excluding Sunday was 0.5 cm. Due to heavy rainfall on Sunday, the average for the week rose to 1.5 cm. The rainfall on Sunday was:

6.5 cm

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7.5 cm

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8.5 cm

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8.0 cm

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Solution

The correct option is B
7.5 cm

$1.5 \times 7 - 6 \times 0.5 = 7.5.$

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The average rainfall for a week excluding Sunday was 0.5 cm. Due to heavy rainfall on Sunday, the average for the week rose to 1.5 cm. The rainfall on Sunday was:

The correct option is B 7.5 cm 1.5×7−6×0.5=7.5.

The correct option is B
7.5 cm

$1.5 \times 7 - 6 \times 0.5 = 7.5.$