Question

please help, it's exponent​

Answer 1

Answer:

a2*b-2  [tex]\boxed{\begin{array}{|c|c|c|c|}\bf \: classes&\bf \: class \: mark(f_i) \: &\bf \: frequency(y_i)& \bf f_iy_i

\\\dfrac{\qquad\qquad}{}&\dfrac{\qquad\qquad}{}&\dfrac{\qquad\qquad\qquad}{}&  \dfrac{\qquad \qquad}{}\\\sf84 - 90&\sf 87\: &\sf8 &\sf696\\\sf90 - 96&\sf93&\sf12& \sf \: 1116\\\sf96 - 102&\sf99&\sf15 & \sf1485\\\sf102 - 108&\sf105&\sf10& \sf \: 1050\\\sf108 -114 &\sf111&\sf5& \sf \: 555\\\ \:  \dfrac{\qquad\qquad}{ \sf \: total}&  \dfrac{\qquad\qquad}{} & \dfrac{\qquad\qquad}{ \sf \: 50}& \dfrac{\qquad\qquad}{ \sf4902} \end{array}}[/tex]

Step-by-step explanation:

[tex]\boxed{\begin{array}{|c|c|c|c|}\bf \: classes&\bf \: class \: mark(f_i) \: &\bf \: frequency(y_i)& \bf f_iy_i

\\\dfrac{\qquad\qquad}{}&\dfrac{\qquad\qquad}{}&\dfrac{\qquad\qquad\qquad}{}&  \dfrac{\qquad \qquad}{}\\\sf84 - 90&\sf 87\: &\sf8 &\sf696\\\sf90 - 96&\sf93&\sf12& \sf \: 1116\\\sf96 - 102&\sf99&\sf15 & \sf1485\\\sf102 - 108&\sf105&\sf10& \sf \: 1050\\\sf108 -114 &\sf111&\sf5& \sf \: 555\\\ \:  \dfrac{\qquad\qquad}{ \sf \: total}&  \dfrac{\qquad\qquad}{} & \dfrac{\qquad\qquad}{ \sf \: 50}& \dfrac{\qquad\qquad}{ \sf4902} \end{array}}[/tex]

Answer 2

Refer to the pic attached .