Find the probability of a 4 turning up at least once in two tosses of a fair die.

Explanation

Nutrients: carbohydrates (energy), proteins (growth and repair), fats (energy storage, insulation), vitamins (regulate functions), minerals (various functions), water (transport, reactions), fiber (digestive health).

Balanced diet contains all nutrients in right proportions. Deficiency causes disease: kwashiorkor (protein), marasmus (general malnutrition), scurvy (vitamin C), rickets (vitamin D), goiter (iodine).

Digestion breaks food into absorbable molecules. Mechanical (teeth, churning) and chemical (enzymes). Absorption mainly in small intestine. Large intestine absorbs water. Undigested material excreted as feces.