The phrase "allowed a number" is correct and usable in written English.
It can be used in contexts where permission is granted to use or reference a specific quantity or figure.
Example: "The teacher allowed a number of students to retake the exam if they had valid reasons."
Alternatives: "permitted a quantity" or "granted a figure".
The democratization of Tunisia, Egypt and other countries has allowed a number of extremist free riders into the political system.
Durand, the Paris publisher, still held the copyrights to Debussy and Ravel and allowed a number of serious mistakes to stand for years.
Two counties -- Miami-Dade and Palm Beach -- rejected a number of legal votes, Democratic lawyers say, while Nassau County allowed a number of illegal votes.
But symptomatic treatment of gout and other complications has allowed a number of patients to live into their 40s instead of dying before their fifth birthday, said Dr. Nyhan, who now works at the University of California, San Diego.
The governor has said he is personally opposed to the death penalty, but he has allowed a number of executions to take place since he took office in 2006.
The maquiladoras were devised in 1965 as an alternative to the bracero programme, then just ended, that allowed a number of migrant Mexican farm-workers into the United States.
Elections would allow a number of groups now excluded from the political mix to have a place at the table.
Loss of the outer layer of the ovum allows a number of spermatozoa to penetrate the egg's surface.
On sunny days, of which its dry climate allows a number, it enjoys a radiant northern light that bounces off the broad river estuary that it faces.
As Ryan approaches the present, he also allows a number of political scientists and sociologists to join the pure philosophers, from Max Weber to David Riesman.
The type apparatus allows a number variants.
