Math Problem Statement

Evaluate the expression 5! / [3!(5 - 3)!] without using a calculator.

Solution

The expression to evaluate from your image is:

5!3!(53)!\frac{5!}{3!(5 - 3)!}

Let's break this down:

  1. 5!5! means 5×4×3×2×1=1205 \times 4 \times 3 \times 2 \times 1 = 120.
  2. 3!3! means 3×2×1=63 \times 2 \times 1 = 6.
  3. (53)!=2!(5 - 3)! = 2!, which is 2×1=22 \times 1 = 2.

Now, substitute these into the expression:

5!3!×(53)!=1206×2=12012=10\frac{5!}{3! \times (5 - 3)!} = \frac{120}{6 \times 2} = \frac{120}{12} = 10

So, the answer is 1010.

Would you like further details or have any questions?

Here are 5 related questions you might find useful:

  1. How do factorials work and why are they useful in combinatorics?
  2. What is the significance of permutations in mathematics?
  3. Can you explain how the binomial coefficient is related to factorials?
  4. How does simplifying expressions involving factorials work?
  5. In what real-world situations might factorials and combinations be used?

Tip: When simplifying expressions involving factorials, always look for common terms that can be canceled out to make the computation easier.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Factorial
Combinatorics
Simplification

Formulas

n! = n × (n-1) × ... × 1
Binomial coefficient formula: C(n, r) = n! / (r! × (n - r)!)

Theorems

Factorial properties
Combinatorial simplification

Suitable Grade Level

Grades 9-12