हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

A Coin is Tossed 80 Times and the Head is Obtained 38 Times. Now, If a Coin Tossed Once, What Will the Probability of Getting a Head - Mathematics

Advertisements
Advertisements

प्रश्न

A coin is tossed 80 times and the head is obtained 38 times. Now, if a coin tossed once, what will the probability of getting a  head

योग

उत्तर

∵ Total number of possible outcomes = 80
and, the number of favourable outcomes of getting head = 38

∴ Probability of getting a head =`"Number of favourable outcomes"/"Total number of outcomes"`

= `38/80=19/40`

shaalaa.com
Concept for Feel of Probability Using Data Through Experiments.
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 22: Probability - Exercise 22 (A)

APPEARS IN

सेलिना Concise Mathematics [English] Class 7 ICSE
अध्याय 22 Probability
Exercise 22 (A) | Q 2.2

संबंधित प्रश्न

A coin is tossed 80 times and the head is obtained 38 times. Now, if a coin tossed once, what will the probability of getting a tail


There are 8 marbles in a bag with numbers from 1 to 8 marked on each of them. What is the probability of drawing a marble with a number
(i) 3
(ii) 7


Two coins are tossed simultaneously 100 times and the outcomes are as given below:

Outcomes Two heads
(H, H)
Exactly one head
(H T or T H)
No head
(T T)
No. of times 21 55 24

If the same pair of coins is tossed again at random, find the probability of getting:
(i) two heads
(ii) exactly one head
(iii) no head.


A bag contains 4 white and 6 black balls,- all of the same shape and same size. A ball is drawn from the bag without looking into the bag. Find the probability that the ball drawn is:
(i) a black ball
(ii) a white ball
(iii) not a black ball


Hundred identical cards are numbered from 1 to 100. The cards are well shuffled and then a card is drawn. Find the probability that the number on the card drawn is 40


Suppose S is the event that will happen tomorrow and P(S) = 0.03. Find P(S’)


Five Students A, B, C, D, and E are competing in a long-distance race. Each student’s probability of winning the race is given below:
A → 20%, B → 22%, C → 7%, D → 15% and E → 36%
(i) Who is most likely to win the race?
(ii) Who is least likely to win the race?
(iii) Find the sum of probabilities given.
(iv) Find the probability that either A or D will win the race.
(v) Let S be the event that B will win the race.
(a) Find P(S)
(b) State, in words, the complementary event S’.
(c) Find P(S’)


A carton contains eight brown and four white eggs. Find the probability that an egg selected at random is:
(i) brown
(ii) white


A box contains 3 yellow, 4 green, and 8 blue tickets. A ticket is chosen at random. Find the probability that the ticket is:
(i) yellow
(ii) green
(iii) blue
(iv) red
(v) not yellow


The following table shows number of males and number of females of a small locality in different age groups.

Age in years 10-20 21-50 Above 50
Male 8 12 6
female 6 10 4

If one of the persons, from this locality, is picked at random, what is the probability that

  1. the person picked is a male?
  2. the person picked is a female?
  3. the person picked is a female aged 21-50?
  4. the person is a male with age up to 50 years?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×