The photograph shows two avocados. © Andrii Gorulko / Alamy Stock Photo The effect of eating avocados each week on the risk of coronary heart disease (CHD) was investigated. A group of men and women who had no signs of cardiovascular disease (CVD) or stroke were selected. They were all between the ages of 30 and 75 . The group ate avocados each week to replace animal products in their diet whenever possible. The group all completed a questionnaire about the food they ate at the start of the investigation and every four years after that for over 30 years. There were 41701 men and 68786 women in the group. Which is the ratio of men to women? (1)

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