Question Detail Average of 10 numbers is zero. At most how many numbers may be greater than zero 0159 Answer: Option D Similar Questions : 1. Average of all prime numbers between 30 to 50 3737.83939.8 Answer: Option DExplanation:Prime numbers between 30 and 50 are: 31, 37, 41, 43, 47 Average of prime numbers between 30 to 50 will be \begin{aligned} (\frac{31+37+41+43+47}{5}) = \frac{199}{5} = 39.8 \end{aligned} 2. Average weight of 10 people increased by 1.5 kg when one person of 45 kg is replaced by a new man. Then weight of the new man is 50556065 Answer: Option CExplanation:Total weight increased is 1.5 * 10 = 15. So weight of new person is 45+15 = 60 3. Find the sum of first 30 natural numbers 470468465463 Answer: Option CExplanation:Sum of n natural numbers \begin{aligned} = \frac{n(n+1)}{2} \end{aligned} \begin{aligned} = \frac{30(30+1)}{2} = \frac{30(31)}{2} = 465 \end{aligned} 4. Average age of boys in a class is 16 years and average age of girls is 15 years, what is the average age of all 15.51516Cant be computed Answer: Option DExplanation:As number of girls and boys is not given so result cant be computed 5. Average of first five multiples of 3 is 9111315 Answer: Option AExplanation:\begin{aligned} Average = \frac{3(1+2+3+4+5)}{5} = \frac{45}{5} = 9 \end{aligned} Read more from - Average Questions Answers