My solution emiranda:

Ho: p = 0.4

H1: p > 0.4

Since n = 20, not large enough to use normal approximation for z test statistic.

X: No. of pasta lovers choose lasagna

X ~ Bin (20,0.4)

Since x = 9 > 20(0.4) = 8

P = (X>=9) = 1-(X<9)=1-0.5956(from table) = 0.4044

Since P > α=0.05, accept Ho.