Question
The average of 19 numbers is 15.The average of first 9
numbers are12 and that of the last 9 numbers are15. What will be the 19th number?Solution
Sum of 19 numbers = 19 × 15 = 285 Sum of first 9 numbers = 9 × 12 = 108 Sum of last 9 numbers = 9 × 15 = 135 Therefore, 19th number = 285 – (108 + 135) = 42
More Average Questions
(√1157 + 10.15% of 159.89) × 4.85 + 150.25 = ? × 19.67
{(√2305) % of 74.69} × 15.21 - 27.89 × 44.88 + 45.12% of 2399.87
(9116.89 – 8024.89 + 902.95) × 14 = 1800 × ?
(124.99)² = ?
? * 4.89 = (410.15 ÷ 13.97) % of 6190 - 1342.77
181.87 ÷ 13.89 X 8.13 + ? = 11.852Â
(√845 ×19.932+ √4230 ×14.385)/(√1765 ×4.877 ) = ?
180.25 × 14.995 ÷ √26 = ? × 5.985
1224.86% of √6399.98 = (399.99/4.99)% of (? ÷ 6.91 + 39.87)Â
24.11% of 249.99 + √143.97 ÷ 12.02 = ?
