From the forecast given buy whether forecasting office, $20$ days forecast be true out of $100$ days. The probability in which forecast not be true is _______.

\frac{1}{4}

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\frac{4}{5}

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\frac{1}{3}

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\frac{3}{4}

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Solution

The correct option is C $\frac{4}{5}$
From the forecast given by whether forcasting office, $20$ days forecast be true out of $100$ days.
$∴ 100 - 20 = 80$ days forecast not be true out of $100$ days.
So, the probability in which forecast not be true $= \frac{80}{100} = \frac{4}{5}$ .

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From the forecast given buy whether forecasting office, 20 days forecast be true out of 100 days. The probability in which forecast not be true is _______.

The correct option is C 45From the forecast given by whether forcasting office, 20 days forecast be true out of 100 days.∴100−20=80 days forecast not be true out of 100 days.So, the probability in which forecast not be true =80100=45.

From the forecast given buy whether forecasting office, $20$ days forecast be true out of $100$ days. The probability in which forecast not be true is _______.

The correct option is C $\frac{4}{5}$
From the forecast given by whether forcasting office, $20$ days forecast be true out of $100$ days.
$∴ 100 - 20 = 80$ days forecast not be true out of $100$ days.
So, the probability in which forecast not be true $= \frac{80}{100} = \frac{4}{5}$ .