Binomial distribution with N=20, p=0.1 same with cumulative probability
m B(20,m,0.2,FALSE) m B(20,m,0.2,TRUE)
0 0.01152922 0 0.01152922
Here's the Binomial distribution with N=20, p=0.2

The blue line is the probability of exactly m successes in 20 trials.

The pink line is the probability of m or fewer successes in 20 trials.
1 0.05764608 1 0.06917529
2 0.13690943 2 0.20608472
3 0.20536414 3 0.41144886
4 0.2181994 4 0.62964826
5 0.17455952 5 0.80420779
6 0.1090997 6 0.91330749
7 0.05454985 7 0.96785734
8 0.02216088 8 0.99001821
9 0.00738696 9 0.99740517
10 0.00203141 10 0.99943659
11 0.00046168 11 0.99989827
12 8.6566E-05 12 0.99998484
13 1.3318E-05 13 0.99999815
14 1.6647E-06 14 0.99999982
15 1.6647E-07 15 0.99999999
16 1.3006E-08 16 1
17 7.6504E-10 17 1
18 3.1877E-11 18 1
19 8.3886E-13 19 1
20 1.0486E-14 20 1