AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

We have to form words of 4 letters with the letters of the word MATHEMATICS, then

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Number of words with all letters different is 1680

Total number of such formation is greater than 2436

Total number of words is 2436

Number of words in which 2 letters are identical is 800

answer is B, D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

$\begin{array}{l} M, A, T \to 2 \\ H, E, I, C, S \to 1 \end{array}$

Type

Combination

Permutation

All different

2 same 2 different

2 same 2 same

$^{8} C_{4}$

$^{3} C_{1} \times^{7} C_{2}$

$^{3} C_{2}$

$^{8} P_{4} = 1680$

$^{3} C_{1} \times^{7} C_{2} \times \frac{4!}{2!} = 756$

$^{3} C_{2} \times \frac{4!}{2! 2!} = 18$

Total

2454

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!