Skip to content
Philoid
Browse Saved
Back to chapter
Mathematics
15. Probability
Home · Class 9 · Mathematics · Ref. Book · 15. Probability
Prev
Next
Q15 of 50 Page 15

Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:


Find the probability of getting at most two heads.

Concept Used:


.


Explanation:


At most two heads = (No head + 1 head + 2 heads)


At most two heads = 177 heads



More from this chapter

All 50 →
13

A die is thrown 100 times. If the probability of getting an even number is 2/5. How many times is an odd number obtained?

14

Two unbiased dice are tossed together. Find the probability that the total of the number on the dice is greater than 9.

16

Given below is the frequency distribution table regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days.


Find the probability of concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days.

17

The following table gives the life time of 400 neon lamps:

A bulb is selected at random. Find the probability that the lifetime of the selected bulb is:

(i) less than 400


(ii) between 300 to 800 hours


(iii)at least 700 hours.

Questions · 50
15. Probability
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Back to chapter
ADVERTISEMENT
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved