Q:

A) 31( 5/7) | B) 32 (6/7) |

C) 34(4/7) | D) 35(4/9) |

Answer: A) 31( 5/7)

Explanation:

Explanation:

Required average = (67 * 2 + 35 * 2 + 6 * 3) / (2 + 2 + 3)

= (134 + 70 + 18) / 7 = 222 / 7 = 31(5/7) years.

0
15

0
61

Q:

A) 62 kg | B) 61 kg |

C) 60 kg | D) 63 kg |

1
118

Q:

A) 59.2kg | B) 58.6kg |

C) 58.8kg | D) 59kg |

2
138

1
134

1
218

2
285

Q:

A) 33 | B) 34 |

C) 39 | D) 29 |

Answer & Explanation
Answer: A) 33

Explanation:

Explanation:

Let the fifth number be x.

The average of the first four numbers = 3x

Sum of all the first four numbers = 3x = 12x

The average of all the five numbers = 85.8

Sum of all the five numbers = 85.8 5 = 429

Sum of all the first four numbers + 5th number = 429

12x + x = 429

x = 429/13 = 33

The 5th number is 33.

1
230