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. If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is 54.4854.6854.6054.58 Answer: Option BExplanation:\begin{aligned} \frac{(55 \times 50) +(60 \times 55) +(45 \times 60) }{55 + 60 + 45} \end{aligned} \begin{aligned} \frac{8750}{160} = 54.68 \end{aligned} 2. 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 3. The average of four consecutive odd numbers is 24. Find the largest number. 25272931 Answer: Option BExplanation:Let the numbers are x, x+2, x+4, x+6, then \begin{aligned} => \frac{x+(x+2)+(x+4)+(x+6)}{4} = 24 \end{aligned} \begin{aligned} => \frac{4x+12)}{4} = 24 \end{aligned} \begin{aligned} => x+3 = 24 => x = 21 \end{aligned} So largest number is 21 + 6 = 27 4. A motorist travel to a place 150 km away at an avearge speed of 50 km/hr and returns ar 30 km/hr.His average speed for the whole jouney in km/hr is 36.5 km/hr37.5 km/hr35.5 km/hr34.5 km/hr Answer: Option BExplanation:Average speed will be \begin{aligned} \frac{2xy}{x+y} km/hr= \frac{2(50)(30)}{50+30} km/hr \end{aligned}= 37.5 km/hr 5. Average of five numbers is 27. If one number is excluded the average becomes 25. The excluded number is 35455565 Answer: Option AExplanation:Number is (5*27) - (4*25) = 135-100 = 35 Read more from - Average Questions Answers