Question

Ravi has invited 12 friends to his birthday party that's what Ravi has 132 it and if we distribute it is equally among all this friends then how many gifts will each get

Answer 1

Answer:

option is

B

31

First of all calculate the total number of ways in which the friends can be invited i.e without imposing any condition on the number of friends that can come.

Each friend has 2 ways i.e the friend will be invited or the friend will not be invited and also that whether the friend will be invited or not does depend on anybody else so invitation of each friend is an independent event.

So 1 friend leads to 2 ways

then 5 friends leads to 2×2×2×2×2=2

5

ways .

Now the condition is one or more friend has to be invited so if we subtract the case where 0 friends were invited from a total number of ways we will get the desired answer.

No. of ways in which no friends are invited =1

So our answer is =2

5

−1=31 ways

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SIMILAR QUESTIONS

star-struck

In a chess tournament, where the participants were to play one game with another.If the total number of games played is 91, the number of participants in the tournament are

Medium

Answer 2

Given:

Total number of friends = 12

Total number of gifts = 132

To Find:

How many gifts each friend will get

Solution:

Since there are 12 friends and the gifts are 132, to find how much each got, we need to divide.

Therefore,

Gifts to each friend = Total number of gifts/ Total number of friends

= 132/12

= 11

Thus, each friend received 11 gifts.

Check: This can be checked by multiplication -

= 11 x 12

= 132

Answer: Each friend has received 11 gifts.