if a letter in the word below is chosen at random, what is the probability that it has a vertical line of…

Explanation:

Step1: Count total letters

The word "CALCULATOR" has 10 letters.

Step2: Identify letters with vertical symmetry

The letters with vertical symmetry in "CALCULATOR" are C, A, L, C, A, T, O, so there are 7 such letters.

Step3: Calculate probability

The probability formula is $P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. Here, the number of favorable outcomes is 7 and the total number of outcomes is 10. So $P = \frac{7}{10}$.

Answer:

$\frac{7}{10}$