Which of these statement about $y=8\sqrt{m}$ is correct?

A bag `contains 4 red and 6 black ball of the same size. If the ball are shuffled briskly and two ball are drawn one after the other without replacement . Find the probability of picking ball of different colours

Given that the mean of the scores 15, 21, 17, 26, 18 and 29 is 21. Calculate the standard deviation of the scores.

The position of three  ships P, Q and R at sea are illustrated in the diagram . The arrow indicated the North direction. The bearing of Q from P is 050^o and $\angle PQR={{72}^{\circ }}$ .Calculate the bearing of R from Q

A kite on a taut string of length 50m  inclined at an angle of 54^o to the horizontal ground. The height of the kite above the ground is

If cos(x + 40^o) = 0.0872, what is the value of x?

In the diagram, MN, PQ and RS are three intersecting straight lines, which of the following statement (s) is/are true?

i.  t = y

ii. x + y + z + m  = 180^o

iii x +m +n = 180^o

iv. x + n = m + z

In the diagram $MQ\parallel RS,\angle TUV={{70}^{\circ }}\text{and }\angle RLV={{30}^{\circ }}$ find the value of x

In the diagram O is the centre of the circle PQRS and $\angle PSR={{86}^{\circ }}$, if $\angle POR={{x}^{\circ }}$ find x

In $\Delta XYZ$ $\left| XY \right|=8cm,$$\left| YZ \right|=10cm$and $\left| XZ \right|=6cm$ which of theses relations is true?