Probabilty

The probability of complement event of impossible event is ___________.

(A) 0.5

(B) 0

(C) 1

(D) 0.46

(A) 0.5

(B) 0

(C) 1

(D) 0.46

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Gujarat Board Paper 2016

Following is the information about the number of students studying in a high school. If one student of the school is to be elected as a representative, find out the probability of the elected student to be a boy of Std. IX.

(A) $\frac{1}{5}$

(B) $\frac{3}{5}$

(C) $\frac{2}{5}$

(D) $\frac{4}{5}$

Std. | Boys | Girls | Total |

IX | 220 | 110 | 330 |

X | 110 | 110 | 220 |

Total | 330 | 220 | 550 |

(A) $\frac{1}{5}$

(B) $\frac{3}{5}$

(C) $\frac{2}{5}$

(D) $\frac{4}{5}$

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Gujarat Board Paper 2015