Question

N coins tossed simultaneously , probability of at most x head

Answer 1

At least two” can also be written as “not less than two” or x≥2x≥2

“At most two” can also be written as “not more than two” or x≤2x≤2

The important thing is that the number two is included in the comparison.

This contrasts with comparisons like “more than two” or “less than two” in which the number two is excluded.