In a series of \(100\) observations, half of them is equal to \(p\) and remaining half equal to \(-p

In a series of \(100\) observations, half of them is equal to \(p\) and remaining half equal to \(-p - চর্চা

marks	10	15	20	25	30
No.of student	2	4	68	5	5

In a series of $100$ observations, half of them is equal to $p$ and remaining half equal to $-p$ if the standard deviation of these observations is $10$ then $|p|=$ __