Question

Question no 5...... Answer m fst plzz

Answer 1

Answer:

mean = ∑fx/∑f = 53.8

fx in the distribution is......

10×12=  120

30×15= 450

50×32= 1600

70×p= 70p

90×17= 1530

∑fx= 3700 + 70p

mean = 3700+70p / 76+p = 53.8

3700+70p = 4088.8 + 53.8p

16.2 × p = 388.8

∴ p = 24