Question 364114
The probability that X is less than 7 doesn’t included seven because it is not less than or equal to seven but instead it is 0-6 days probability added together= 0.68+0.05+0.07+0.08+0.05+0.04+0.01=0.98
If we know that the probabilities all add up to one, we could also subtract 0.02 from 1 to come up with the answer. 
Is this correct?

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The paragraph I copied above is correct.  The paragraph you posted
above this one is not correct.
Cheers,
Stan H.