Question

The mean of P ,Q, R, S and T is 28 if the mean of p, r and t
is 24 what is the mean of q and S

Answer 1

(p+q+r+s+t)/5=28
=>p+q+r+s+t=140       ---- eq1

(p+r+t)/3=24
=>(p+r+t)=72              ----eq2

substitute eq2 in eq1,

p+q+r+s+t=140
=>72+q+s=140
=>q+s=140-72
=>q+s=68

Mean of q and s =(q+s)/2
                           = 68/2
                            =34.

Answer 2

Answer:

34

Step-by-step explanation:

(p+q+r+s+t)/5=28

p+q+r+s+t=140..................(1)

(p+r+t)/3=24

(p+r+t) = 72.........................(2)

By substituting (2) in(1)

p+q+r+s+t =140

》72+q+s=140

》q+s =140-72

》q+s=68

mean of q&s=(q+s)/2

=68/2

=34