JEE Mains Model Paper 15

Since there are just four matches to be played, India can get a maximum of 8 points.
∴ P(lndia gets at least 7 points)
= P(getting exactly 7 points) + P(getting exactly 8 points)
= P(getting 2 in each of the 3 matches and 1 in one match) + P(getting 2 in each of the four matches)
=

4

‌

C3 (0.5)3 (0.05) +

4

‌

C4 (0.5)4
= (0.5)3 (0.2 + 0.5) = 0.125 × 0.7 = 000875