A bag contains 19 red balls, 37 blue balls and 27 green balls. If a ball is picked up from this bag a random, what is the probability of picking a blue ball?

• 19/83

• 37/87

• 34/81

• 34/81

•  3/13
•  4/13
• 6/13
• 6/13

A cylindrical tennis ball container can contain maximum three balls stacked on one another. The top and bottom balls also touch the lid and the base of the base of the container respectively. If the volume
of a tennis ball is 240 cm3, then what is the volume of the container?

• 1080 cm3

• 840 cm3

• 1440 cm3

• 1440 cm3

Two coins are tossed simultaneously. The probability of getting at the most one head is:

• ¼

• ½

• ¾

• ¾

• 1 in 1000
• l in 1000.000
• l in 1000000000
• l in 1000000000

A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a perfect square number is:

• 1/10

• 1/11

• 1/90

• 1/90