BISC QUANTUM QUEST ROUND 3 2026

• 484cm²

• 971cm²

• 814cm²

• 660cm²

• 9

• 8

• 10

• 7.5

A jar of marbles has 35 marbles in it. 8 are blue marbles, 16 are red marbles, 4 are green marbles and 7 are yellow marbles. What is the probability that the first three marbles picked are green or blue (non replacement).

The figure shows a circle with center O. AC is tangent to the circle at A and OBC is straight line. Given that,

∠AOB is estimated to 60°,
Line AC= 15cm and
Line BC= 9cm 
Find the shaded area

• 67.5