A website Maths Puzzle Numerical Ability Probability

Find the probability distribution of number of doublets in three throws of a pair of
dice.

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A website Other Question

Three shopkeepers A, B, C are using polythene, handmade bags (prepared by prisoners), and newspaper’s envelope as carry bags. it is found that the shopkeepers A, B, C are using (20,30,40) , (30,40,20,) , (40,20,30) polythene , handmade bags and newspapers envelopes respectively. The shopkeepers A, B, C spent Rs.250, Rs.220 & Rs.200 on these carry bags
respectively .Find the cost of each carry bags using matrices. Keeping in mind the social & environmental conditions, which shopkeeper is better? & why?
In a triangle XYZ, the lengths of the sides XY and XZ equal 17.5 cm and 9 cm respectively. Let W be a point on the line segment YZ such that YZ is perpendicular to XW. If XW = 3 cm, then what is the radius (in cm) of the circle circumscribing the triangle XYZ?
17.05
27.85
22.45
26.25