21 .
In how many different ways can the letters of the word 'DETAIL' be arranged such that the vowels must occupy only the odd positions?

A. | None of these | B. | 64 |

C. | 120 | D. | 36 |

22 .
A bag contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the bag, if at least one black ball is to be included in the draw?

A. | 64 | B. | 128 |

C. | 32 | D. | None of these |

23 .
In how many different ways can the letters of the word 'JUDGE' be arranged such that the vowels always come together?

A. | None of these | B. | 48 |

C. | 32 | D. | 64 |

24 .
In how many ways can the letters of the word 'LEADER' be arranged?

A. | None of these | B. | 120 |

C. | 360 | D. | 720 |

25 .
In how many different ways can the letters of the word 'RUMOUR' be arranged?

A. | None of these | B. | 128 |

C. | 360 | D. | 180 |

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