I am reading a mathematics book and I am quite confused at this highlighted sentence (it's not about the mathematical context but about the grammar):

enter image description here

Is a verb missing in the relative clause "that a random variable X [...]"?

In my opinion, I would understand this sentence as:

When the target space T is continuous, e.g., the real line R, it is more natural to specify the probability (that a random variable X takes) is in an interval, denoted by [...].

  • 1
    Thank you for your answer, I understand the sentence now. Regarding the screenshot, since it contains some mathematical expressions and I cannot write them so I use the screenshot. I will be careful next time.
    – k2pctdn
    Commented Dec 15, 2021 at 15:49
  • The mathematical symbols are not relevant to the grammar. However, they can be pasted: P ( a ⩽ X ⩽ B ) for a < b - You can find mathematical symbols in text form on some web site by a Google search and then copy and paste. Or use the Character Map app in Windows ≤≤≤≤≤ or type in Microsoft Word using Insert Symbol then copy and paste. Commented Dec 15, 2021 at 16:23

1 Answer 1


I parsed it as follows

[a random variable is in an interval]
[the probability that [a random variable is in an interval]]
[it's more natural to specify [the probability that [a random variable is in an interval]]]

is is the verb in the first clause.

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