Study the following information carefully to answer the given questions.
A survey was conducted on 400 MPs who won the elections in 1952,1957 and 1962. It was found that 20% MPs won l952 elections only. 18.75% won in 1957 only and 33.5% won in 1962 only. 6.25% MPs won in 1952 and l957, but lost in 1962, 9% won in 1952 and 1962 but lost in 1957 and 9.5% MPs won 1957 and 1962 elections but lost in 1952.
The number of MPs who won in at least two elections is what percentage of the total number of MPs surveyed?