On the occasion Of Deepawali festival each student of a class sends greeting cards to the others. If there are 20 students in the class, then the total number of getting cards exchanged by the students is

^{20} C_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

{2.}^{20} C_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

{2.}^{20} P_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

None of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A ${2.}^{20} C_{2}$
Each student will send $19$ greetings.
There are $20$ students.
$∴$ The number of greetings exchanged $= 20 \times 19 = {2.}^{20} C_{2}$

Suggest Corrections

Similar questions

Q. On the occasion of Dipawali festival each student of a class sends greeting cards to others. If there are

20

students in the class, the number of cards send by students is

On the occasion of New Year each student of a class sends greeting cards to the others. If there are 20 students in the class, then the total number of greeting cards exchanged by the students is ______.

Q. On the occasion of Dipawali festival each student of a class sends greeting cards to one another. If the postmen deliver

1640

greeting cards to the students of this class, then the number of students in the class is

Q. 930 Deepawali greeting cards are exchanged amongst the students of a class. If every student sends a card to every other student then what is the number of students in the class?

Q. In a class there are certain number of students. On the new year day every student posts a greeting card to all of his classmates. If the total number of greeting cards posted by them is

870

Then find the number of students.

Join BYJU'S Learning Program

On the occasion Of Deepawali festival each student of a class sends greeting cards to the others. If there are 20 students in the class, then the total number of getting cards exchanged by the students is

The correct option is A 2.20C2Each student will send 19 greetings.There are 20 students.∴ The number of greetings exchanged =20×19=2.20C2

The correct option is A ${2.}^{20} C_{2}$
Each student will send $19$ greetings.
There are $20$ students.
$∴$ The number of greetings exchanged $= 20 \times 19 = {2.}^{20} C_{2}$