Here are some examples of how to write 14 in sentences: My daughter has saved fourteen dollars to buy a new Barbie. The universe is roughly fourteen billion years old. Fourteen is a rough age. My dog weighs fourteen pounds. Where did you live when you were fourteen years old?

Example 14 If A and B are two independent events, then the probability of occurrence of at least one of A and B is given by 1– P (A′) P (B′) Since events A and B are independent ∴ P (A ∩ B) = P (A).

Example 14 Find angle ‘θ’ between the vectors 𝑎 ⃗ = 𝑖 ̂ + 𝑗 ̂ − 𝑘 ̂ and 𝑏 ⃗ = 𝑖 ̂ − 𝑗 ̂ + 𝑘 ̂. Given 𝑎 ⃗ = 𝑖 ̂ + 𝑗 ̂ − 𝑘 ̂ 𝑏 ⃗ = 𝑖 ̂ – 𝑗 ̂ + 𝑘 ̂ We know that 𝒂 ⃗. 𝒃 ⃗ = "|" 𝒂 ⃗"|" "|" 𝒃 ⃗"|" cos θ where θ is the angle between 𝑎 ⃗ and 𝑏 ⃗ Finding |𝒂 ⃗ |, |𝒃 ⃗ | and 𝒂 ⃗. 𝒃 ⃗ M