ANSWER: 25
Explanation:
India will be launching these satellites using PSLV with 12 of these belonging to the US and remaining 13 from 6 other countries such as Germany, Canada and Japan. PSLV with its string of successful flights has emerged as one of the most reliable launch vehicles in the world. Till date 47 foreign satellites have been launched from as many as 21 different countries on board the PSLV, under an arrangement between commercial arm of ISR Antrim and foreign clients.