std 8 science ch 13 swadhyay , dhoran 8 vigyan ch 13 swadhyay , ધોરણ 8 વિજ્ઞાન પાઠ 13 સ્વાધ્યાય

Add: 8/(13)\ a n d\ 2/3

If the median of 6,4,7,13 and p is 8 then find the value of p

If 23$35 = 13, 3$5 = 8 then what is the value of 4$13 = ?

What is the arithmetic mean of first 8 multiples of 13?

12 14 17 13 8 14 21 13 4 ?

Two circles, each having radius 4, have a common tangent given by 3x+2y-6=0 at (2, 0) . Then their centres are : (A) (2+ 5/sqrt(13), 8/sqrt(13)), (2- 5/sqrt(13) , (-8)/sqrt(13)) (B) (2+ 12/sqrt(13), 8/sqrt(13)) , (2- 12/sqrt(13), (-8)/sqrt(13)) (C) (2, 3), (4, 5) (D) none of these

The variance of observations 8,12,13,15,22, is

On subtracting -13 from -8, we get