Isra has only ฿5 and ฿1 notes with her. If the total number of notes that she has is 15 and the amount of money with her is ฿ 27, then the number of ฿5 and ฿1 notes are, respectively

In the given figure, tangents ^@ PQ ^@ and ^@ PR ^@ are drawn from an external point ^@ P ^@ to a circle with center ^@ O ^@, such that ^@ \angle RPQ = 60^\circ ^@. A chord ^@ RS ^@ is drawn parallel to the tangent ^@ PQ ^@. What is the measure of ^@ \angle RQS ^@ ?

A decorative block shown in the figure is made of two solids_a cube and a hemisphere. The base of the block is the cube with edge of 3.2 cm and the hemisphere attached on the top has a diameter of 2.5 cm. If the block to be painted, then the total area to be painted is:

A coin is tossed ^@ 600 ^@ times and it is found that head comes up ^@ 306 ^@ times and tail ^@ 294 ^@ times.
If a coin is tossed at random, what is the probability of getting a head?

Following chart shows number of students in a school who got distinction in one of three subjects. Find the number of students who got distinction in English and Chemistry.