IB Math AA SL 2021 May TZ1 paper 2 full solution (Section B)

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Section A is here:

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Hello could you please do N21 P2 TZ0 Math AA HL? I need help with question 3, I believe there's something wrong with my calculator and I can't seem to solve the problem. Really would appreciate it.

My problem is the following:

The question is about using the binomial distribution. On my TI-84 Plus (CE-T), I go to the Binom(cdf) option, plug in the numbers, but the answer I get is incorrect. I checked on a video on Revision Village, and when the person used that option, they were able to plug in a maximum and minimum value.

Question 3 on N21 P2 TZ0 (Math AA HL) involves finding the probability of the variables, X, being greater than or equal to 1.

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