Question 1078711
for 3: 9C3*.3^3*.7^6, notice where all the 3s and 9s go.
=0.2668
for 2: 9C2*.3^2*.7^7=0.2669
For 1: 9*.3*.7^8=0.1556
for 0:.7^9=0.0404
Total is 0.7301