Question

If one number is selected from first 70 natural numbers, find the probability that the number is a solution of x^2 + 2x > 4.
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Answer 1

Step-by-step explanation:

Given If one number is selected from first 70 natural numbers, find the probability that the number is a solution of x^2 + 2x  > 4

• Now probability is given by probability = number of favourable outcomes / total number of possible outcomes.
• Now a number is selected at random from first natural numbers.
• So we get total number of outcomes will be 70
• Favourable outcomes will be  
• So x^2 + 2x > 4
• Now taking 1 we get  1^2 + 2 (1) = 3 < 4
•                                    2^2 + 2(2) = 8 > 4
• So all other numbers up to 70 will be greater than 4. So we have                70 – 1 = 69
• So total number of favourable outcomes will be 69
• Therefore probability will be 69 / 70

Reference link will be

https://brainly.in/question/8619616