Mean and Standard deviation of 100 observation is 50 and 10 respectively. What will be the new mean and Standard deviation if each observation is multiplied by 3?
Both mean and SD are affected by change in scale New Mean = 50*3 = 150 New SD = 10*3 = 30
The income of a person is Rs.15000 and his expenditure is Rs.12000. In the next year his income and expenditure is increased by 8% and 13% respectively....
32 × 3 (54 – 15) + 186 ÷ 3 ÷ 2 – (21)² =?
25% of 140 + 2 × 8 = ? + 9 × 5
128 ÷ 22 × ? = 15% of 300 ÷ 9
4/5 + 6/7 × 14/42 ÷ 24/35 = ?
187 ÷ 5 ÷ 0.4 = ? – 24 × 2.4
96% of 4500 – 34% of 650 = ?
18% of 200 - 16% of 150 = ?
(75 + 0.25 × 10) × 4 = ?2 - 14
1428 ÷ 17 = ? % of 120
