CBSE Guess > Papers > Question Papers > Class X > 2009 > Mathematics > Mathematics
Q. 7. In Fig. 2, PA and PB are tangents drawn from a point P to the circle with centre O. If 
Ans . 120
Sol .
Q. 8. What is the angle subtended at the centreof a circle of radius 7 cm, by an arc of length 11 cm?
Ans . 90°
Sol .
Q. 9. What is the common difference of an AP whose nth term is 3 + 5n? 1
Sol .
nth term, an = 3 + 5n
When n = 1, a1 = 3 + 5(1) = 8
When n = 2, a2 = 3 + 5(2) = 3 + 10 = 13
Common difference, d = a2 – a1 = 13 – 8 = 5
Q. 10 . What is the probability that two friends have different birthdays? 1
Sol .
Total no. of days in a year = 365
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CBSE 2009 Question Papers Class X