The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. if the sum of the first and the last number is 13. what is the last numbers
Answers
Answered by
3
n1+n2+n3=16*3=48; eq.1
n2+n3+n4=15*3=45; eq. 2
eq1-eq2
n1-n4=48-45=3;
n1+n4=13 (given in question)
by solving above 2 eq.
2n1=16;
n1=8;
so last number is 8+n4=13;
n4=5
n2+n3+n4=15*3=45; eq. 2
eq1-eq2
n1-n4=48-45=3;
n1+n4=13 (given in question)
by solving above 2 eq.
2n1=16;
n1=8;
so last number is 8+n4=13;
n4=5
Similar questions