(10x5)+(10x14)+(10x-3)
50+140-30
160
Due the parentheses first so 16+4+11*2-21 then multiply 16+4+22-21 from here you can answer left to right 20+4+22-21 then 24+1=25
we have given that 30 students .
we need to choose committee of 4 students .
so the formula used here
.
where n is the total number of students.
and r is the student chosen from total.
so the possibility of choosing a commitee of 4 from 30 is
.
so there 27405 possibilities can exist.