2. 630 a. b.
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
![2. 630
a.
b.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fec6e8a19-d0ab-4264-bdd5-f6aa3d19dcba%2F6c6db9d1-e0d0-4af3-b1bc-0c9ce02d2715%2F2t31ew_processed.jpeg&w=3840&q=75)
![2 How many 7-digit numbers can be formed from the digits 1, 1, 2, 2, 4, 4 and 5 if repetition is not
allowed. If one of these numbers is chosen at random, find the probability that it is
a. greater than 4,000,000
b. even number and greater than 4,000,000](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fec6e8a19-d0ab-4264-bdd5-f6aa3d19dcba%2F6c6db9d1-e0d0-4af3-b1bc-0c9ce02d2715%2F8sp0jhl_processed.jpeg&w=3840&q=75)
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