Indira has total of rs 2100 as notes denominators Rs 50 rs 20 and rs 10. the ratio of the number of rs 20 notes is 2:3, if she has a total of 100 notes, how many notes of each denominators does she have?

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,