The phrase "a report in which" is correct and usable in written English.
It can be used to introduce a description of the content or focus of a report, often followed by details about what the report covers.
Example: "The report in which we analyze the market trends will be published next week."
Alternatives: "a report that details" or "a report covering".
Only days after two foreign tourists had been wounded by gunfire in Delhi, Australian TV broadcast on Wednesday a report in which a reporter purchased bomb-making devices to smuggle through security points.
Ofcom has already issued a report in which a number of changes are proposed.
Recently, he said, he heard a report in which a couple bickered over who should go to the grocery store.
Create an experiment to test that hypothesis, perform it, and write up a report in which you analyze your results.
In April 2011, OGX issued a report in which it claimed over 10 billion barrels in reserves.
Interdisciplinary Connections: Civics – Write a report in which you evaluate the rewards of lotteries for the players and the government that administers them.
The libertarian Cato Institute recently issued a report in which it found that economic freedom — shorthand for smaller government and fewer regulations — has never been greater.
The team produced a report in which it was concluded that the problems had originated with two local employees in Malawi, especially Anjimile Oponyo.
David MacQuigg, the Medical Corps doctor assigned to the team, also filed a report, in which he expressed naked contempt for the men he had experimented on.
Last week, the bank released a report in which it faulted itself and the International Monetary Fund for making Africa poorer through failed lending policies over 40 years.
His group had produced a report in which two-thirds of headteachers questioned whether they would be able to balance the books in four years' time.
