On average, 60 flashlights account for five out of order. Find a chance to buy a working flashlight

60-5 = 55 (serviceable flashlights), 55 ⁄ 60 = 11 ⁄ 12

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.