Q:

A) 45 | B) 40 |

C) 39 | D) 37 |

Answer: B) 40

Explanation:

Explanation:

Let there be x pupils in the class.

Total increase in marks = (x * 1/2) = x/2.

x/2 = (83 - 63) => x/2 = 20 => x = 40.

0
80

1
135

1
228

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.

0
198

3
379

Q:

A) 34 deg C | B) 35 deg C |

C) 36 deg C | D) 38 deg C |

6
353

12
688

6
585