The next section of the worksheet after skipping a row or two, can be labeled: Adding up probabilities. For the example you will be carrying out rst, calculate the probability of at most 8 successes; then calculate the probability of between 10 and 14 successes; and nally, compute the probability of at least one half (15) successes. You can type in these ranges on three rows: 0 to 8; 10 to 14; and 15 to 30. We will come back in Step 4 and ll in the sums