The mean of n observation is x. If the first observation is increased by 1, the second by 2, the third by 3, and so on, then the new mean is(a) x+2n+1(b) x+n+12(c) x+n+1(d) x-n+12

The mean of n observation is x. If the first observation is increased

1.	The mean of n observation is x. If the first observation is increased by 1, the second by 2, the third by 3, and so on, then the new mean is(a) x+2n+1(b) x+n+12(c) x+n+1(d) x-n+12
Answer» The mean of n observation is $x$ . If the first observation is increased by 1, the second by 2, the third by 3, and so on, then the new mean is (a) $x + (2 n + 1)$ (b) $x + \frac{n + 1}{2}$ (c) $x + (n + 1)$ (d) $x - \frac{n + 1}{2}$