Question

xx | 1818 | 1919 | 2020 | 2121 | 2222 |

F(x)F(x) | 2020 | 33 | 99 | 44 | 44 |

Let xx be the ages of students in a class. Given the frequency distribution F(x)F(x) above, determine the following probabilities:

(a) P(x≥21 or x<19)=P(x≥21 or x<19)=

equation editor

Equation Editor

(b) P(x≤21)=P(x≤21)=

equation editor

Equation Editor

(c) P(x<22)=P(x<22)=

Step 1

From the given frequency distribution, the corresponding probabilities are given in the below table.

Step 2

a).

The required probability can be obtained as follows.

Step 3

b).

The required probability can b...

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