Matrices

[hazy oar]

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[valid fjord]

n = 36

diagonal matrix means it has only diagonal elements remaining are zero

Let diagonal elements be a , b , c

det = a(bc) = 120

abc = 120

120 has 5 factors i.e, 120 = 2 * 2 * 2 * 3 * 5

[gentle bison]

yeah I got upto here

[valid fjord]

we gotta choose 3 out of those 5,,,frm permutations n combinations , its 5^C3 * 3 factorial

thats 5 factorial * 3 factorial /2 factorial

[gentle bison]

what?

[valid fjord]

I assume you didnt study permutations n combinations yet?

[gentle bison]

I have

studied permutations and combinations

[gentle bison]

I know nCr I didn't understand 3 out 5 permutations

[valid fjord]

There are total 5 factors for 120 ryt

out of them u gotta choose 3 as ur diagonal elements

And arrange them in three different ways each

[gentle bison]

ohhh

[valid fjord]

yeah got it?

[gentle bison]

i think waitlet me try it

[gentle bison]

I didn't get what you said but I got the answer by another method but thanks anyways

[nova cape]

@gentle bison has given 1 rep to @valid fjord

[gentle bison]

+close