Read the passage and answer the questions.

Every child in England must receive full time education from the age of five to sixteen. Many parents send their children to state schools where the tuition and the equipment, textbooks and exercise books are free. About 5% of children go to fee-paying school. Under the old system, children attended primary school (from five to eleven) which was followed by a secondary school course (from eleven to fifteen or over. At eleven every child had to sit for the eleven –plus examination. It consisted of tests in English, Arithmetic and intelligence tests. Those with the highest marks (about 20% of the children) went to grammar school. The others went to technical school.

Who were allowed to go to grammar school?