Ineed to find the mean variance and standard deviation of the probability distribution rounded to the nearest hundredth, survey was taken of students in a high school to determine the number of extra curricular activities each student engages in

activities is 0-7

students is 10,30,25,45,63,21,17,3

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!